My wife is Japanese and we spent the pandemic year in Tokyo with our then 1-yr old daughter. Netflix worked there flawlessly and had both native JP content and a lot of US/English content.
Now that we’re back in the US Netflix provides a good amount of content with Japanese subtitles and audio tracks. It’s nice that we can have the audio for my daughter to listen to. She spoke only Japanese when we were in Tokyo and I’d like to keep her engaged with the language for as long as possible because I suspect once she goes to school she’ll give up Japanese in favor of English.