diff --git a/log/base_handler.ts b/log/base_handler.ts
index 0f51d0f278f6..2a3bde8829b2 100644
--- a/log/base_handler.ts
+++ b/log/base_handler.ts
@@ -50,14 +50,20 @@ export class BaseHandler {
     if (this.level > logRecord.level) return;
 
     const msg = this.format(logRecord);
-    this.log(msg);
+    this.#log(msg);
   }
 
   format(logRecord: LogRecord): string {
     return this.formatter(logRecord);
   }
 
+  /**
+   * @deprecated (will be removed in 0.220.0)
+   */
   log(_msg: string) {}
+  #log(msg: string) {
+    this.log(msg);
+  }
   setup() {}
   destroy() {}
 
diff --git a/log/console_handler.ts b/log/console_handler.ts
index 8625652e8628..e92cc358f26f 100644
--- a/log/console_handler.ts
+++ b/log/console_handler.ts
@@ -24,12 +24,17 @@ export class ConsoleHandler extends BaseHandler {
     let msg = super.format(logRecord);
 
     if (this.#useColors) {
-      msg = this.applyColors(msg, logRecord.level);
+      msg = this.#applyColors(msg, logRecord.level);
     }
 
     return msg;
   }
-
+  #applyColors(msg: string, level: number): string {
+    return this.applyColors(msg, level);
+  }
+  /**
+   * @deprecated (will be removed in 0.220.0)
+   */
   applyColors(msg: string, level: number): string {
     switch (level) {
       case LogLevels.INFO:
@@ -51,7 +56,7 @@ export class ConsoleHandler extends BaseHandler {
     return msg;
   }
 
-  override log(msg: string) {
+  override #log(msg: string) {
     console.log(msg);
   }
 }
diff --git a/log/file_handler.ts b/log/file_handler.ts
index f265e13cd42e..ce02a2620e42 100644
--- a/log/file_handler.ts
+++ b/log/file_handler.ts
@@ -85,6 +85,13 @@ export class FileHandler extends BaseHandler {
     }
   }
 
+  #flush() {
+    this.#flush();
+  }
+
+  /**
+   * @deprecated (will be removed in 0.220.0)
+   */
   flush() {
     if (this._pointer > 0 && this._file) {
       let written = 0;
diff --git a/log/logger.ts b/log/logger.ts
index bf68f081b6c2..37dd162ab1b1 100644
--- a/log/logger.ts
+++ b/log/logger.ts
@@ -120,9 +120,9 @@ export class Logger {
     let logMessage: string;
     if (msg instanceof Function) {
       fnResult = msg();
-      logMessage = this.asString(fnResult);
+      logMessage = this.#asString(fnResult);
     } else {
-      logMessage = this.asString(msg);
+      logMessage = this.#asString(msg);
     }
     const record: LogRecord = new LogRecord({
       msg: logMessage,
@@ -138,6 +138,12 @@ export class Logger {
     return msg instanceof Function ? fnResult : msg;
   }
 
+  #asString(data: unknown, isProperty = false): string {
+    return this.asString(data, isProperty);
+  }
+  /**
+   * @deprecated (will be removed in 0.220.0)
+   */
   asString(data: unknown, isProperty = false): string {
     if (typeof data === "string") {
       if (isProperty) return `"${data}"`;
@@ -156,7 +162,7 @@ export class Logger {
     } else if (typeof data === "object") {
       return `{${
         Object.entries(data)
-          .map(([k, v]) => `"${k}":${this.asString(v, true)}`)
+          .map(([k, v]) => `"${k}":${this.#asString(v, true)}`)
           .join(",")
       }}`;
     }
diff --git a/log/rotating_file_handler.ts b/log/rotating_file_handler.ts
index 5255951f60cb..186fd0c56200 100644
--- a/log/rotating_file_handler.ts
+++ b/log/rotating_file_handler.ts
@@ -99,7 +99,7 @@ export class RotatingFileHandler extends FileHandler {
     const msgByteLength = this._encoder.encode(msg).byteLength + 1;
 
     if (this.#currentFileSize + msgByteLength > this.#maxBytes) {
-      this.rotateLogFiles();
+      this.#rotateLogFiles();
       this.#currentFileSize = 0;
     }
 
@@ -107,7 +107,12 @@ export class RotatingFileHandler extends FileHandler {
 
     this.#currentFileSize += msgByteLength;
   }
-
+  #rotateLogFiles() {
+    this.rotateLogFiles();
+  }
+  /**
+   * @deprecated (will be removed in 0.220.0)
+   */
   rotateLogFiles() {
     this.flush();
     this._file!.close();