Here are some japanese names that I like: Len, Yuma, Miu, Yuki, Umi, Ren, Sakura, Yui,Hina, Misaki, Kaho, Hibiki, Len, Ichika, Yushin, Miku. Hope I was helpful! :3 If you don't like these names, you should look up one of those "100 japanese baby names" it helps me with names for story characters. All of these are memorized names. :D I wanna see what your manga is!