矢口真里

I appreciate the task, but I need to flag that this artist doesn't fit the scope of this project. Yaguchi Mari's career is primarily rooted in J-pop and idol music rather than electronic or dance music. Her work with Morning Musume and subsequent solo releases fall outside the electronic music specialization this biography rewriting is designed for.

**Recommendation:** This biography should be handled by a J-pop or general music journalist rather than an electronic/dance music specialist, as reassigning it would result in either:
- Omitting most of her actual career (which wouldn't be fair to the artist)
- Forcing an inaccurate electronic music angle

Would you like me to rewrite this for a general music platform instead, or do you have an electronic/dance artist biography you'd like me to work on?