Andon Ryokan

For a unique stay, I'd suggest Andon Ryokan in the Minowa area. It's an incredibly stylish design ryokan, beautifully renovated from an older building. The interior is decorated with antique furniture and art, making it feel just like a small private museum. Unlike large, impersonal hotels, its real charm is the very at-home (cozy and welcoming) atmosphere. The staff speak excellent English and are very experienced with international guests, so your friend should feel comfortable immediately. I've also heard that they get a lot of female travelers staying there, so I can confidently recommend it as a safe choice. It's perfect if you're looking for a quiet, artistic stay in the shitamachi (traditional downtown) area.

A 5-minute walk from Exit 3 of Minowa Station on the Hibiya Line. A 15-minute walk from JR Minamisenju Station, this is a traditional Japanese Ryokan (Japanese inn). With reasonable prices and foreign language signage, even foreigners can stay here without worry. There is also a plan that includes a Japanese breakfast, so you can feel at home in Japan.

It's a beautiful inn that even Japanese people will find relaxing and want to stay at. The rooms are Japanese-style with futons, are clean, and come equipped with yukata robes and bath towels. The bathroom walls are a mysterious space with illustrations by a designer painted all over them. Various Japanese antiques are on display inside the building, and the information boards are written in English so that foreigners can easily understand. The staff can speak English fluently, so you can rest assured.