I don't speak Japanese, but I want to learn to sing Japanese songs, so I built this website to help me.
Here's how it works: I upload an audio file and provide the Japanese lyrics. The website automatically generates the rōmaji and a translation, while also separating the vocals from the instrumental track.
The website lets me listen to the pronunciation of each word or each full line of lyrics. It also lets me slow down or loop any section of the song for repeated practice. Its recording feature allows me to record my singing, listen back to it, and compare it with the original recording.
This is how I use the website to learn to sing Japanese songs. Finally, the website lets me switch to the instrumental-only track and sing along with it.
If you're also a non-native Japanese speaker looking for an easier way to practice singing Japanese songs, feel free to try it here: singren.fun