diff --git a/src/types.ts b/src/types.ts
index 09bfeb97..101eed7f 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -6,7 +6,7 @@
 /* eslint-disable @typescript-eslint/no-unused-vars */
 /* eslint-disable @typescript-eslint/no-explicit-any */
 import type { Context } from './context'
-import type { Hono } from './hono'
+import type { HonoBase } from './hono-base'
 import type { CustomHeader, RequestHeader } from './utils/headers'
 import type { StatusCode } from './utils/http-status'
 import type {
@@ -119,7 +119,7 @@ export interface HandlerInterface<
     E2 extends Env = E
   >(
     handler: H<E2, P, I, R>
-  ): Hono<IntersectNonAnyTypes<[E, E2]>, S & ToSchema<M, P, I, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<IntersectNonAnyTypes<[E, E2]>, S & ToSchema<M, P, I, MergeTypedResponse<R>>, BasePath>
 
   // app.get(handler x2)
   <
@@ -131,7 +131,7 @@ export interface HandlerInterface<
     E3 extends Env = IntersectNonAnyTypes<[E, E2]>
   >(
     ...handlers: [H<E2, P, I>, H<E3, P, I2, R>]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3]>,
     S & ToSchema<M, P, I2, MergeTypedResponse<R>>,
     BasePath
@@ -147,7 +147,7 @@ export interface HandlerInterface<
   >(
     path: P,
     handler: H<E2, MergedPath, I, R>
-  ): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<M, MergePath<BasePath, P>, I, MergeTypedResponse<R>>, BasePath>
 
   // app.get(handler x 3)
   <
@@ -161,7 +161,7 @@ export interface HandlerInterface<
     E4 extends Env = IntersectNonAnyTypes<[E, E2, E3]>
   >(
     ...handlers: [H<E2, P, I>, H<E3, P, I2>, H<E4, P, I3, R>]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4]>,
     S & ToSchema<M, P, I3, MergeTypedResponse<R>>,
     BasePath
@@ -179,7 +179,7 @@ export interface HandlerInterface<
   >(
     path: P,
     ...handlers: [H<E2, MergedPath, I>, H<E3, MergedPath, I2, R>]
-  ): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I2, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<M, MergePath<BasePath, P>, I2, MergeTypedResponse<R>>, BasePath>
 
   // app.get(handler x 4)
   <
@@ -195,7 +195,7 @@ export interface HandlerInterface<
     E5 extends Env = IntersectNonAnyTypes<[E, E2, E3, E4]>
   >(
     ...handlers: [H<E2, P, I>, H<E3, P, I2>, H<E4, P, I3>, H<E5, P, I4, R>]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5]>,
     S & ToSchema<M, P, I4, MergeTypedResponse<R>>,
     BasePath
@@ -215,7 +215,7 @@ export interface HandlerInterface<
   >(
     path: P,
     ...handlers: [H<E2, MergedPath, I>, H<E3, MergedPath, I2>, H<E4, MergedPath, I3, R>]
-  ): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I3, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<M, MergePath<BasePath, P>, I3, MergeTypedResponse<R>>, BasePath>
 
   // app.get(handler x 5)
   <
@@ -233,7 +233,7 @@ export interface HandlerInterface<
     E6 extends Env = IntersectNonAnyTypes<[E, E2, E3, E4, E5]>
   >(
     ...handlers: [H<E2, P, I>, H<E3, P, I2>, H<E4, P, I3>, H<E5, P, I4>, H<E6, P, I5, R>]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6]>,
     S & ToSchema<M, P, I5, MergeTypedResponse<R>>,
     BasePath
@@ -260,7 +260,7 @@ export interface HandlerInterface<
       H<E4, MergedPath, I3>,
       H<E5, MergedPath, I4, R>
     ]
-  ): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I4, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<M, MergePath<BasePath, P>, I4, MergeTypedResponse<R>>, BasePath>
 
   // app.get(handler x 6)
   <
@@ -287,7 +287,7 @@ export interface HandlerInterface<
       H<E6, P, I5>,
       H<E7, P, I6, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7]>,
     S & ToSchema<M, P, I6, MergeTypedResponse<R>>,
     BasePath
@@ -317,7 +317,7 @@ export interface HandlerInterface<
       H<E5, MergedPath, I4>,
       H<E6, MergedPath, I5, R>
     ]
-  ): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I5, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<M, MergePath<BasePath, P>, I5, MergeTypedResponse<R>>, BasePath>
 
   // app.get(handler x 7)
   <
@@ -347,7 +347,7 @@ export interface HandlerInterface<
       H<E7, P, I6>,
       H<E8, P, I7, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8]>,
     S & ToSchema<M, P, I7, MergeTypedResponse<R>>,
     BasePath
@@ -380,7 +380,7 @@ export interface HandlerInterface<
       H<E6, MergedPath, I5>,
       H<E7, MergedPath, I6, R>
     ]
-  ): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I6, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<M, MergePath<BasePath, P>, I6, MergeTypedResponse<R>>, BasePath>
 
   // app.get(handler x 8)
   <
@@ -413,7 +413,7 @@ export interface HandlerInterface<
       H<E8, P, I7>,
       H<E9, P, I8, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9]>,
     S & ToSchema<M, P, I8, MergeTypedResponse<R>>,
     BasePath
@@ -449,7 +449,7 @@ export interface HandlerInterface<
       H<E7, MergedPath, I6>,
       H<E8, MergedPath, I7, R>
     ]
-  ): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I7, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<M, MergePath<BasePath, P>, I7, MergeTypedResponse<R>>, BasePath>
 
   // app.get(handler x 9)
   <
@@ -485,7 +485,7 @@ export interface HandlerInterface<
       H<E9, P, I8>,
       H<E10, P, I9, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9, E10]>,
     S & ToSchema<M, P, I9, MergeTypedResponse<R>>,
     BasePath
@@ -524,7 +524,7 @@ export interface HandlerInterface<
       H<E8, MergedPath, I7>,
       H<E9, MergedPath, I8, R>
     ]
-  ): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I8, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<M, MergePath<BasePath, P>, I8, MergeTypedResponse<R>>, BasePath>
 
   // app.get(handler x 10)
   <
@@ -563,7 +563,7 @@ export interface HandlerInterface<
       H<E10, P, I9>,
       H<E11, P, I10, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9, E10, E11]>,
     S & ToSchema<M, P, I10, MergeTypedResponse<R>>,
     BasePath
@@ -605,7 +605,7 @@ export interface HandlerInterface<
       H<E9, MergedPath, I8>,
       H<E10, MergedPath, I9, R>
     ]
-  ): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I9, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<M, MergePath<BasePath, P>, I9, MergeTypedResponse<R>>, BasePath>
 
   // app.get(path, handler x10)
   <
@@ -646,7 +646,7 @@ export interface HandlerInterface<
       H<E10, MergedPath, I9>,
       H<E11, MergedPath, I10, R>
     ]
-  ): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I10, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<M, MergePath<BasePath, P>, I10, MergeTypedResponse<R>>, BasePath>
 
   // app.get(...handlers[])
   <
@@ -655,18 +655,18 @@ export interface HandlerInterface<
     R extends HandlerResponse<any> = any
   >(
     ...handlers: H<E, P, I, R>[]
-  ): Hono<E, S & ToSchema<M, P, I, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<M, P, I, MergeTypedResponse<R>>, BasePath>
 
   // app.get(path, ...handlers[])
   <P extends string, I extends Input = BlankInput, R extends HandlerResponse<any> = any>(
     path: P,
     ...handlers: H<E, MergePath<BasePath, P>, I, R>[]
-  ): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<M, MergePath<BasePath, P>, I, MergeTypedResponse<R>>, BasePath>
 
   // app.get(path)
   <P extends string, R extends HandlerResponse<any> = any, I extends Input = BlankInput>(
     path: P
-  ): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<M, MergePath<BasePath, P>, I, MergeTypedResponse<R>>, BasePath>
 }
 
 ////////////////////////////////////////
@@ -683,12 +683,12 @@ export interface MiddlewareHandlerInterface<
   //// app.use(...handlers[])
   <E2 extends Env = E>(
     ...handlers: MiddlewareHandler<E2, MergePath<BasePath, ExtractStringKey<S>>>[]
-  ): Hono<IntersectNonAnyTypes<[E, E2]>, S, BasePath>
+  ): HonoBase<IntersectNonAnyTypes<[E, E2]>, S, BasePath>
 
   // app.use(handler)
   <E2 extends Env = E>(
     handler: MiddlewareHandler<E2, MergePath<BasePath, ExtractStringKey<S>>>
-  ): Hono<IntersectNonAnyTypes<[E, E2]>, S, BasePath>
+  ): HonoBase<IntersectNonAnyTypes<[E, E2]>, S, BasePath>
 
   // app.use(handler x2)
   <
@@ -697,7 +697,7 @@ export interface MiddlewareHandlerInterface<
     P extends string = MergePath<BasePath, ExtractStringKey<S>>
   >(
     ...handlers: [MiddlewareHandler<E2, P>, MiddlewareHandler<E3, P>]
-  ): Hono<IntersectNonAnyTypes<[E, E2, E3]>, S, BasePath>
+  ): HonoBase<IntersectNonAnyTypes<[E, E2, E3]>, S, BasePath>
 
   // app.get(path, handler)
   <
@@ -707,7 +707,7 @@ export interface MiddlewareHandlerInterface<
   >(
     path: P,
     handler: MiddlewareHandler<E2, MergedPath>
-  ): Hono<IntersectNonAnyTypes<[E, E2]>, ChangePathOfSchema<S, MergedPath>, BasePath>
+  ): HonoBase<IntersectNonAnyTypes<[E, E2]>, ChangePathOfSchema<S, MergedPath>, BasePath>
 
   // app.use(handler x3)
   <
@@ -717,7 +717,7 @@ export interface MiddlewareHandlerInterface<
     P extends string = MergePath<BasePath, ExtractStringKey<S>>
   >(
     ...handlers: [MiddlewareHandler<E2, P>, MiddlewareHandler<E3, P>, MiddlewareHandler<E4, P>]
-  ): Hono<IntersectNonAnyTypes<[E, E2, E3, E4]>, S, BasePath>
+  ): HonoBase<IntersectNonAnyTypes<[E, E2, E3, E4]>, S, BasePath>
 
   // app.get(path, handler x2)
   <
@@ -728,7 +728,7 @@ export interface MiddlewareHandlerInterface<
   >(
     path: P,
     ...handlers: [MiddlewareHandler<E2, P>, MiddlewareHandler<E3, P>]
-  ): Hono<IntersectNonAnyTypes<[E, E2, E3]>, ChangePathOfSchema<S, MergedPath>, BasePath>
+  ): HonoBase<IntersectNonAnyTypes<[E, E2, E3]>, ChangePathOfSchema<S, MergedPath>, BasePath>
 
   // app.use(handler x4)
   <
@@ -744,7 +744,7 @@ export interface MiddlewareHandlerInterface<
       MiddlewareHandler<E4, P>,
       MiddlewareHandler<E5, P>
     ]
-  ): Hono<IntersectNonAnyTypes<[E, E2, E3, E4, E5]>, S, BasePath>
+  ): HonoBase<IntersectNonAnyTypes<[E, E2, E3, E4, E5]>, S, BasePath>
 
   // app.get(path, handler x3)
   <
@@ -756,7 +756,7 @@ export interface MiddlewareHandlerInterface<
   >(
     path: P,
     ...handlers: [MiddlewareHandler<E2, P>, MiddlewareHandler<E3, P>, MiddlewareHandler<E4, P>]
-  ): Hono<IntersectNonAnyTypes<[E, E2, E3, E4]>, ChangePathOfSchema<S, MergedPath>, BasePath>
+  ): HonoBase<IntersectNonAnyTypes<[E, E2, E3, E4]>, ChangePathOfSchema<S, MergedPath>, BasePath>
 
   // app.use(handler x5)
   <
@@ -774,7 +774,7 @@ export interface MiddlewareHandlerInterface<
       MiddlewareHandler<E5, P>,
       MiddlewareHandler<E6, P>
     ]
-  ): Hono<IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6]>, S, BasePath>
+  ): HonoBase<IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6]>, S, BasePath>
 
   // app.get(path, handler x4)
   <
@@ -792,7 +792,11 @@ export interface MiddlewareHandlerInterface<
       MiddlewareHandler<E4, P>,
       MiddlewareHandler<E5, P>
     ]
-  ): Hono<IntersectNonAnyTypes<[E, E2, E3, E4, E5]>, ChangePathOfSchema<S, MergedPath>, BasePath>
+  ): HonoBase<
+    IntersectNonAnyTypes<[E, E2, E3, E4, E5]>,
+    ChangePathOfSchema<S, MergedPath>,
+    BasePath
+  >
 
   // app.use(handler x6)
   <
@@ -812,7 +816,7 @@ export interface MiddlewareHandlerInterface<
       MiddlewareHandler<E6, P>,
       MiddlewareHandler<E7, P>
     ]
-  ): Hono<IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7]>, S, BasePath>
+  ): HonoBase<IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7]>, S, BasePath>
 
   // app.get(path, handler x5)
   <
@@ -832,7 +836,7 @@ export interface MiddlewareHandlerInterface<
       MiddlewareHandler<E5, P>,
       MiddlewareHandler<E6, P>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6]>,
     ChangePathOfSchema<S, MergedPath>,
     BasePath
@@ -858,7 +862,7 @@ export interface MiddlewareHandlerInterface<
       MiddlewareHandler<E7, P>,
       MiddlewareHandler<E8, P>
     ]
-  ): Hono<IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8]>, S, BasePath>
+  ): HonoBase<IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8]>, S, BasePath>
 
   // app.get(path, handler x6)
   <
@@ -880,7 +884,7 @@ export interface MiddlewareHandlerInterface<
       MiddlewareHandler<E6, P>,
       MiddlewareHandler<E7, P>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7]>,
     ChangePathOfSchema<S, MergedPath>,
     BasePath
@@ -908,7 +912,7 @@ export interface MiddlewareHandlerInterface<
       MiddlewareHandler<E8, P>,
       MiddlewareHandler<E9, P>
     ]
-  ): Hono<IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9]>, S, BasePath>
+  ): HonoBase<IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9]>, S, BasePath>
 
   // app.get(path, handler x7)
   <
@@ -932,7 +936,7 @@ export interface MiddlewareHandlerInterface<
       MiddlewareHandler<E7, P>,
       MiddlewareHandler<E8, P>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8]>,
     ChangePathOfSchema<S, MergedPath>,
     BasePath
@@ -962,7 +966,7 @@ export interface MiddlewareHandlerInterface<
       MiddlewareHandler<E9, P>,
       MiddlewareHandler<E10, P>
     ]
-  ): Hono<IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9, E10]>, S, BasePath>
+  ): HonoBase<IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9, E10]>, S, BasePath>
 
   // app.get(path, handler x8)
   <
@@ -988,7 +992,7 @@ export interface MiddlewareHandlerInterface<
       MiddlewareHandler<E8, P>,
       MiddlewareHandler<E9, P>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9]>,
     ChangePathOfSchema<S, MergedPath>,
     BasePath
@@ -1020,7 +1024,7 @@ export interface MiddlewareHandlerInterface<
       MiddlewareHandler<E10, P>,
       MiddlewareHandler<E11, P>
     ]
-  ): Hono<IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9, E10, E11]>, S, BasePath>
+  ): HonoBase<IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9, E10, E11]>, S, BasePath>
 
   // app.get(path, handler x9)
   <
@@ -1048,7 +1052,7 @@ export interface MiddlewareHandlerInterface<
       MiddlewareHandler<E9, P>,
       MiddlewareHandler<E10, P>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9, E10]>,
     ChangePathOfSchema<S, MergedPath>,
     BasePath
@@ -1058,7 +1062,7 @@ export interface MiddlewareHandlerInterface<
   <P extends string, E2 extends Env = E>(
     path: P,
     ...handlers: MiddlewareHandler<E2, MergePath<BasePath, P>>[]
-  ): Hono<E, S, BasePath>
+  ): HonoBase<E, S, BasePath>
 }
 
 ////////////////////////////////////////
@@ -1084,7 +1088,7 @@ export interface OnHandlerInterface<
     method: M,
     path: P,
     handler: H<E2, MergedPath, I, R>
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2]>,
     S & ToSchema<M, MergePath<BasePath, P>, I, MergeTypedResponse<R>>,
     BasePath
@@ -1104,7 +1108,7 @@ export interface OnHandlerInterface<
     method: M,
     path: P,
     ...handlers: [H<E2, MergedPath, I>, H<E3, MergedPath, I2, R>]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3]>,
     S & ToSchema<M, MergePath<BasePath, P>, I2, MergeTypedResponse<R>>,
     BasePath
@@ -1126,7 +1130,7 @@ export interface OnHandlerInterface<
     method: M,
     path: P,
     ...handlers: [H<E2, MergedPath, I>, H<E3, MergedPath, I2>, H<E4, MergedPath, I3, R>]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4]>,
     S & ToSchema<M, MergePath<BasePath, P>, I3, MergeTypedResponse<R>>,
     BasePath
@@ -1155,7 +1159,7 @@ export interface OnHandlerInterface<
       H<E4, MergedPath, I3>,
       H<E5, MergedPath, I4, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5]>,
     S & ToSchema<M, MergePath<BasePath, P>, I4, MergeTypedResponse<R>>,
     BasePath
@@ -1187,7 +1191,7 @@ export interface OnHandlerInterface<
       H<E5, MergedPath, I4>,
       H<E6, MergedPath, I5, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6]>,
     S & ToSchema<M, MergePath<BasePath, P>, I5, MergeTypedResponse<R>>,
     BasePath
@@ -1222,7 +1226,7 @@ export interface OnHandlerInterface<
       H<E6, MergedPath, I5>,
       H<E7, MergedPath, I6, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7]>,
     S & ToSchema<M, MergePath<BasePath, P>, I6, MergeTypedResponse<R>>,
     BasePath
@@ -1260,7 +1264,7 @@ export interface OnHandlerInterface<
       H<E7, MergedPath, I6>,
       H<E8, MergedPath, I7, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8]>,
     S & ToSchema<M, MergePath<BasePath, P>, I7, MergeTypedResponse<R>>,
     BasePath
@@ -1301,7 +1305,7 @@ export interface OnHandlerInterface<
       H<E8, MergedPath, I7>,
       H<E9, MergedPath, I8, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9]>,
     S & ToSchema<M, MergePath<BasePath, P>, I8, MergeTypedResponse<R>>,
     BasePath
@@ -1345,7 +1349,7 @@ export interface OnHandlerInterface<
       H<E9, MergedPath, I8>,
       H<E10, MergedPath, I9, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9, E10]>,
     S & ToSchema<M, MergePath<BasePath, P>, I9, MergeTypedResponse<R>>,
     BasePath
@@ -1391,7 +1395,7 @@ export interface OnHandlerInterface<
       H<E10, MergedPath, I9>,
       H<E11, MergedPath, I10>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9, E10, E11]>,
     S & ToSchema<M, MergePath<BasePath, P>, I10, MergeTypedResponse<HandlerResponse<any>>>,
     BasePath
@@ -1407,7 +1411,7 @@ export interface OnHandlerInterface<
     method: M,
     path: P,
     ...handlers: H<E, MergePath<BasePath, P>, I, R>[]
-  ): Hono<E, S & ToSchema<M, MergePath<BasePath, P>, I, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<M, MergePath<BasePath, P>, I, MergeTypedResponse<R>>, BasePath>
 
   // app.get(method[], path, handler)
   <
@@ -1421,7 +1425,7 @@ export interface OnHandlerInterface<
     methods: Ms,
     path: P,
     handler: H<E2, MergedPath, I, R>
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2]>,
     S & ToSchema<Ms[number], MergePath<BasePath, P>, I, MergeTypedResponse<R>>,
     BasePath
@@ -1441,7 +1445,7 @@ export interface OnHandlerInterface<
     methods: Ms,
     path: P,
     ...handlers: [H<E2, MergedPath, I>, H<E3, MergedPath, I2, R>]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3]>,
     S & ToSchema<Ms[number], MergePath<BasePath, P>, I2, MergeTypedResponse<R>>,
     BasePath
@@ -1463,7 +1467,7 @@ export interface OnHandlerInterface<
     methods: Ms,
     path: P,
     ...handlers: [H<E2, MergedPath, I>, H<E3, MergedPath, I2>, H<E4, MergedPath, I3, R>]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4]>,
     S & ToSchema<Ms[number], MergePath<BasePath, P>, I3, MergeTypedResponse<R>>,
     BasePath
@@ -1492,7 +1496,7 @@ export interface OnHandlerInterface<
       H<E4, MergedPath, I3>,
       H<E5, MergedPath, I4, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5]>,
     S & ToSchema<Ms[number], MergePath<BasePath, P>, I4, MergeTypedResponse<R>>,
     BasePath
@@ -1524,7 +1528,7 @@ export interface OnHandlerInterface<
       H<E5, MergedPath, I4>,
       H<E6, MergedPath, I5, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6]>,
     S & ToSchema<Ms[number], MergePath<BasePath, P>, I5, MergeTypedResponse<R>>,
     BasePath
@@ -1559,7 +1563,7 @@ export interface OnHandlerInterface<
       H<E6, MergedPath, I5>,
       H<E7, MergedPath, I6, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7]>,
     S & ToSchema<Ms[number], MergePath<BasePath, P>, I6, MergeTypedResponse<R>>,
     BasePath
@@ -1597,7 +1601,7 @@ export interface OnHandlerInterface<
       H<E7, MergedPath, I6>,
       H<E8, MergedPath, I7, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8]>,
     S & ToSchema<Ms[number], MergePath<BasePath, P>, I7, MergeTypedResponse<R>>,
     BasePath
@@ -1638,7 +1642,7 @@ export interface OnHandlerInterface<
       H<E8, MergedPath, I7>,
       H<E9, MergedPath, I8, R>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9]>,
     S & ToSchema<Ms[number], MergePath<BasePath, P>, I8, MergeTypedResponse<R>>,
     BasePath
@@ -1681,7 +1685,7 @@ export interface OnHandlerInterface<
       H<E9, MergedPath, I8>,
       H<E10, MergedPath, I9>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9, E10]>,
     S & ToSchema<Ms[number], MergePath<BasePath, P>, I9, MergeTypedResponse<HandlerResponse<any>>>,
     BasePath
@@ -1727,7 +1731,7 @@ export interface OnHandlerInterface<
       H<E10, MergedPath, I9>,
       H<E11, MergedPath, I10>
     ]
-  ): Hono<
+  ): HonoBase<
     IntersectNonAnyTypes<[E, E2, E3, E4, E5, E6, E7, E8, E9, E10, E11]>,
     S & ToSchema<Ms[number], MergePath<BasePath, P>, I10, MergeTypedResponse<HandlerResponse<any>>>,
     BasePath
@@ -1738,14 +1742,14 @@ export interface OnHandlerInterface<
     methods: string[],
     path: P,
     ...handlers: H<E, MergePath<BasePath, P>, I, R>[]
-  ): Hono<E, S & ToSchema<string, MergePath<BasePath, P>, I, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<string, MergePath<BasePath, P>, I, MergeTypedResponse<R>>, BasePath>
 
   // app.on(method | method[], path[], ...handlers[])
   <I extends Input = BlankInput, R extends HandlerResponse<any> = any>(
     methods: string | string[],
     paths: string[],
     ...handlers: H<E, any, I, R>[]
-  ): Hono<E, S & ToSchema<string, string, I, MergeTypedResponse<R>>, BasePath>
+  ): HonoBase<E, S & ToSchema<string, string, I, MergeTypedResponse<R>>, BasePath>
 }
 
 type ExtractStringKey<S> = keyof S & string
@@ -1977,7 +1981,7 @@ export type RemoveQuestion<T> = T extends `${infer R}?` ? R : T
 ////////////////////////////////////////
 
 export type ExtractSchema<T> = UnionToIntersection<
-  T extends Hono<infer _, infer S, any> ? S : never
+  T extends HonoBase<infer _, infer S, any> ? S : never
 >
 
 type EnvOrEmpty<T> = T extends Env ? (Env extends T ? {} : T) : T