diff --git a/cli/tests/unit/sync_test.ts b/cli/tests/unit/sync_test.ts
index c6da9f23f5..40a8054c00 100644
--- a/cli/tests/unit/sync_test.ts
+++ b/cli/tests/unit/sync_test.ts
@@ -27,7 +27,7 @@ Deno.test(
       create: true,
     });
     const data = new Uint8Array(64);
-    await Deno.write(file.rid, data);
+    await file.write(data);
     await Deno.fdatasync(file.rid);
     assertEquals(await Deno.readFile(filename), data);
     await Deno.remove(filename);
diff --git a/cli/tests/unit_node/_fs/_fs_fdatasync_test.ts b/cli/tests/unit_node/_fs/_fs_fdatasync_test.ts
index 6a58eba129..5a57ba5537 100644
--- a/cli/tests/unit_node/_fs/_fs_fdatasync_test.ts
+++ b/cli/tests/unit_node/_fs/_fs_fdatasync_test.ts
@@ -13,7 +13,7 @@ Deno.test({
       create: true,
     });
     const data = new Uint8Array(64);
-    await Deno.write(file.rid, data);
+    await file.write(data);
 
     await new Promise<void>((resolve, reject) => {
       fdatasync(file.rid, (err: Error | null) => {
diff --git a/cli/tests/unit_node/tls_test.ts b/cli/tests/unit_node/tls_test.ts
index e7224ff6d8..3e6a892bd4 100644
--- a/cli/tests/unit_node/tls_test.ts
+++ b/cli/tests/unit_node/tls_test.ts
@@ -117,13 +117,13 @@ Deno.test("tls.createServer creates a TLS server", async () => {
     assertEquals(text.replaceAll("\0", ""), "welcome!\n");
     buf.fill(0);
 
-    Deno.write(conn.rid, new TextEncoder().encode("hey\n"));
+    await conn.write(new TextEncoder().encode("hey\n"));
     await conn.read(buf);
     text = new TextDecoder().decode(buf);
     assertEquals(text.replaceAll("\0", ""), "hey\n");
     buf.fill(0);
 
-    Deno.write(conn.rid, new TextEncoder().encode("goodbye\n"));
+    await conn.write(new TextEncoder().encode("goodbye\n"));
     await conn.read(buf);
     text = new TextDecoder().decode(buf);
     assertEquals(text.replaceAll("\0", ""), "goodbye\n");
diff --git a/cli/tsc/dts/lib.deno.ns.d.ts b/cli/tsc/dts/lib.deno.ns.d.ts
index b255ea6e78..ff37abb84d 100644
--- a/cli/tsc/dts/lib.deno.ns.d.ts
+++ b/cli/tsc/dts/lib.deno.ns.d.ts
@@ -2039,6 +2039,9 @@ declare namespace Deno {
    * const bytesWritten = await Deno.write(file.rid, data); // 11
    * ```
    *
+   * @deprecated Use `writer.write()` instead. {@linkcode Deno.write} will be
+   * removed in Deno 2.0.
+   *
    * @category I/O
    */
   export function write(rid: number, data: Uint8Array): Promise<number>;
@@ -2061,6 +2064,9 @@ declare namespace Deno {
    * const bytesWritten = Deno.writeSync(file.rid, data); // 11
    * ```
    *
+   * @deprecated Use `writer.writeSync()` instead. {@linkcode Deno.writeSync}
+   * will be removed in Deno 2.0.
+   *
    * @category I/O
    */
   export function writeSync(rid: number, data: Uint8Array): number;
@@ -2074,7 +2080,7 @@ declare namespace Deno {
    *   "hello.txt",
    *   { read: true, write: true, truncate: true, create: true },
    * );
-   * await Deno.write(file.rid, new TextEncoder().encode("Hello world"));
+   * await file.write(new TextEncoder().encode("Hello world"));
    *
    * // advance cursor 6 bytes
    * const cursorPosition = await Deno.seek(file.rid, 6, Deno.SeekMode.Start);
@@ -2092,7 +2098,7 @@ declare namespace Deno {
    *   "hello.txt",
    *   { read: true, write: true, truncate: true, create: true },
    * );
-   * await Deno.write(file.rid, new TextEncoder().encode("Hello world"));
+   * await file.write(new TextEncoder().encode("Hello world"));
    *
    * // Seek 6 bytes from the start of the file
    * console.log(await Deno.seek(file.rid, 6, Deno.SeekMode.Start)); // "6"
@@ -2170,7 +2176,7 @@ declare namespace Deno {
    *   "my_file.txt",
    *   { read: true, write: true, create: true },
    * );
-   * await Deno.write(file.rid, new TextEncoder().encode("Hello World"));
+   * await file.write(new TextEncoder().encode("Hello World"));
    * await file.truncate(1);
    * await Deno.fsync(file.rid);
    * console.log(await Deno.readTextFile("my_file.txt")); // H
@@ -2212,7 +2218,7 @@ declare namespace Deno {
    *   "my_file.txt",
    *   { read: true, write: true, create: true },
    * );
-   * await Deno.write(file.rid, new TextEncoder().encode("Hello World"));
+   * await file.write(new TextEncoder().encode("Hello World"));
    * await Deno.fdatasync(file.rid);
    * console.log(await Deno.readTextFile("my_file.txt")); // Hello World
    * ```
@@ -5304,7 +5310,7 @@ declare namespace Deno {
    *   "my_file.txt",
    *   { read: true, write: true, create: true }
    * );
-   * await Deno.write(file.rid, new TextEncoder().encode("Hello World"));
+   * await file.write(new TextEncoder().encode("Hello World"));
    * await Deno.ftruncate(file.rid, 7);
    * const data = new Uint8Array(32);
    * await Deno.read(file.rid, data);
diff --git a/runtime/js/90_deno_ns.js b/runtime/js/90_deno_ns.js
index a957ce0043..72ba0c8d15 100644
--- a/runtime/js/90_deno_ns.js
+++ b/runtime/js/90_deno_ns.js
@@ -140,8 +140,22 @@ const denoNs = {
     );
     return io.readSync(rid, buffer);
   },
-  write: io.write,
-  writeSync: io.writeSync,
+  write(rid, data) {
+    internals.warnOnDeprecatedApi(
+      "Deno.write()",
+      new Error().stack,
+      "Use `writer.write()` instead.",
+    );
+    return io.write(rid, data);
+  },
+  writeSync(rid, data) {
+    internals.warnOnDeprecatedApi(
+      "Deno.writeSync()",
+      new Error().stack,
+      "Use `writer.writeSync()` instead.",
+    );
+    return io.writeSync(rid, data);
+  },
   File: fs.File,
   FsFile,
   open: fs.open,