Listening uses the Japanese voice of your device. Some browsers and systems don't include one. Open the section for your system, then close and reopen the browser.
Quickest fix: on a computer, open the site in Microsoft Edge (natural Japanese voices) or Google Chrome (“Google 日本語”). Brave, Opera and Firefox only use the voices installed on the system.
WindowsYour system
- Open Settings → Time & language → Speech.
- Under Manage voices, choose Add voices, pick Japanese (日本語) and install it.
- Restart the browser and press Test audio again.
macOSYour system
- Open System Settings → Accessibility → Spoken Content.
- Next to System voice, choose Manage Voices…, open Japanese and download Kyoko or Otoya.
- Restart the browser and press Test audio again.
AndroidYour system
- Open Settings and search for “Text-to-speech output”.
- Choose Speech Services by Google, open its settings → Install voice data → Japanese.
- Reopen the browser (Chrome works best).
iPhone and iPadYour system
- Open Settings → Accessibility → Spoken Content → Voices.
- Choose Japanese and download a voice.
- Close Safari completely and open the page again.
LinuxYour system
- Browsers use speech-dispatcher, which rarely has a natural Japanese voice.
- Chrome or Chromium with an internet connection usually offers “Google 日本語”.
ToriiWay