Time Out says
UPDATE: Choyokan closed its doors permanently at the end of March 2016.
Here's a true slice of old Japan, located just five minutes' walk from Tokyo Dome. You'll be sure to rest peacefully at Choyokan, a venerable establishment located in a quiet residential area. The building shows a few signs of age, but the hard-working staff keep the interior spotless. Rooms don't include baths or toilets, but a spacious communal bath is available. Dip yourself in the hot water, stretch out your legs, and let the wear and tear of the road soak away.
1-28-5 Hongo, Bunkyo-ku, Tokyo
|Transport:||Hongo-Sanchome Station (Marunouchi, Oedo lines)|