There is no Japanese warm sound. Koetsu is Japanese and warmer. Then you have Lyra, Zyx and many others that are the opposite. And the majority of cartridges are made in Japan anyways. I would recommend a slightly warmer quality for your style of music. Dynavector maybe. Good drive. I’ve never personally heard a miyajima except for the mono. The other end Lyra, Zyx, etc. may lead to shorter listening sessions with rock music or anything less than nice sounding recordings.