In the images below I've listed various artists based on my own taste, ranging from rock jpop to techno jpop and more! I'd really recommend taking a look for yourself! Maybe you'll find something that suits your taste.
Experiment! You wont know what you'll miss unless you take a peek yourself.
When you listen to a Japanese song for the first time, you immediately think.. Wow, their voice is very Unique. Their vocal style is very easily distinguishable due to their use of high pitches and blending of their language. Accents throughout the country are usually very flat. So its not
too hard to recognize when something is sung in Japanese. Since their style of music is very unique, songs sung in Japanese feel very fresh as they make use of very upbeat lines and tones.