Ryumon just opened in Kami Osaki, across from the West exit of JR Meguro Station. (The ads say it's the Meguro branch but the address is still Shinagawa-ku). It's located in the basement under a natural foods store (green sign). It's a bit cramped, don’t sit right near the door if you can as the automatic door keeps smacking into the table. There was a 30 minute wait for my wife and me on a Thursday night. The original hon ten of Ryumon is in Gotanda, a little bit northeast away from the station. Ryumon is supposed to specialize in hot Szechuan-style cuisine. We had several dishes, including stewed cabbage in crab sauce, shrimp in chili sauce (very good, way above average), a julienned/shaved potatoes dish, and a spicy beef ramen. While everything was very good, the portions were just too small for the price. We spent 7300 yen and we were still a bit hungry afterwards. Above is a picture of the spicy beef soup – this was really spicy and had a lot of spicy ra-yu oil on the top, the noodles were sort of plain though - but the bowl in the above picture was only 6-7 inches across at the top. I think a better bet for high-end Chinese in that area, 3 minutes walk away from Ryumon and JR Meguro station, would be Hong Kong En, near Tonki.
Tabelog page (more pictures)
Bento.com page about Gotanda branch (more pictures)
Shop home page
Diddlefinger Map (English labels)