diff --git a/packages/next/server/node-web-streams-helper.ts b/packages/next/server/node-web-streams-helper.ts
index f854b4e675f3..c3e4eb636b04 100644
--- a/packages/next/server/node-web-streams-helper.ts
+++ b/packages/next/server/node-web-streams-helper.ts
@@ -111,8 +111,8 @@ export function encodeText(input: string) {
   return new TextEncoder().encode(input)
 }
 
-export function decodeText(input?: Uint8Array) {
-  return new TextDecoder().decode(input)
+export function decodeText(input?: Uint8Array, textDecoder?: TextDecoder) {
+  return textDecoder ? textDecoder.decode(input, { stream: true } ) : new TextDecoder().decode(input)
 }
 
 export function createTransformStream<Input, Output>({
@@ -207,9 +207,11 @@ export function createBufferedTransformStream(): TransformStream<
     return pendingFlush
   }
 
+  const textDecoder = new TextDecoder();
+
   return createTransformStream({
     transform(chunk, controller) {
-      bufferedString += decodeText(chunk)
+      bufferedString += decodeText(chunk, textDecoder)
       flushBuffer(controller)
     },
 
diff --git a/test/production/react-18-streaming-ssr/index.test.ts b/test/production/react-18-streaming-ssr/index.test.ts
index 93a9a873051f..52aaaccc55aa 100644
--- a/test/production/react-18-streaming-ssr/index.test.ts
+++ b/test/production/react-18-streaming-ssr/index.test.ts
@@ -61,6 +61,15 @@ describe('react 18 streaming SSR with custom next configs', () => {
             return <p>hello nextjs</p>
           }
         `,
+        'pages/multi-byte.js': `
+          export default function Page() {
+            return (
+              <div>
+                <p>{"マルチバイト".repeat(28)}</p>
+              </div>
+            );
+          }
+        `,
       },
       nextConfig: {
         trailingSlash: true,
@@ -98,4 +107,9 @@ describe('react 18 streaming SSR with custom next configs', () => {
     expect(res.status).toBe(200)
     expect(html).toContain('hello nextjs')
   })
+
+  it('should render multi-byte characters correctly in streaming', async () => {
+    const html = await renderViaHTTP(next.url, '/multi-byte')
+    expect(html).toContain('マルチバイト'.repeat(28))
+  })
 })