Worker in Tokyo seeking advice on clean, affordable accommodation and neighborhoods

Hi, I’m looking for advice on where to move in Tokyo given my work situation and housing constraints.

I moved to Tokyo several months ago and have been living in Mitaka, but my work is now mostly in central Tokyo, with another opportunity in Nakameguro. I’m hoping to find long-term accommodation that’s clean, well-maintained, and reasonably priced.

For context, my current sharehouse has serious maintenance issues (poor heating in winter, pests, mold, and general cleanliness problems). Despite residents reporting issues, management hasn’t addressed them properly, and my contract ends in about two months. Since they only operate on 6-month contracts, I’m planning to move rather than renew.

I tried applying for a private apartment around Ogikubo, but ran into rejections late in the process due to landlord and guarantor company issues. A Japanese colleague (who lived abroad for years before returning) suggested moving to a higher-quality sharehouse as an interim solution, and specifically recommended the Sangenjaya / Meguro area, mentioning that quality and value can actually be better there than further out.

My questions:

• Are there neighborhoods you’d recommend for someone working in central Tokyo and Nakameguro that balance cleanliness, access, and cost?
• Any recommendations for reputable sharehouse companies or areas to focus on (or avoid)?
• Is Meguro / Sangenjaya a good direction, or should I be looking elsewhere?

Thanks for any advice, I appreciate it.