Even though it is "free material," you should follow these standard guidelines provided by the creator:

: It’s generally free for use in videos, games, radio, and theatrical performances.

Most official downloads from these sites come as MP3 . If you specifically need it in m4a format for an Apple device or a specific project, you can easily convert the downloaded file using a tool like CloudConvert or VLC Media Player . Are you planning to use this for a video project or a game?

: Do not claim the music as your own or resell the raw audio file.

: This is the most reliable current source. You can listen to the track and download it directly from this page.

Since the original Rengoku Teien website has been unstable, the creator has officially moved their library to other platforms. You can find and download the track here:

This beautiful, atmospheric track is a well-known piece of royalty-free music by from the popular Japanese site Rengoku Teien (Purgatory Garden). How to Download "Yume Akari"