Found this little eatery next to the Tokyo Metropolitan Museum of Contemporary Art near Kiyosumi Shirakawa Station. Koshinan (Add: 4-8-3 Miyoshi, Koto-ku; Tel: 03-3641-4723) specializes in udon and soba. The nabeyaki udon (udon in hotpot, with tempura and stuff) was very good indeed. Surprisingly, they brought out a very competently prepared English menu, even though we didn’t really need one. Apparently, this restaurant has been around for more than 100 years!