Having eaten at the Shinagawa branch of Uogashi Nihon Ichi as well as Bentenyama Miyako (a few times), we'll just have to agree to disagree. There's no comparison in my mind. Shari at Bentenyama is delicious, well-seasoned with a blend of akasu and gomesu. Neta are high quality and expertly prepared by a sushi legend following classic Edomae preparation techniques. The sushi at Uogashi Nihon Ichi is passable for Y1,500 sushi, but shari is poorly seasoned, on the cold side, neta is pre-sliced sometimes hours before being served... quality overall is slightly lower than what you'd get at Zanmai Honten or Umegaoka Sushinomidori (granted, it is also cheaper). It's passable for what it is (Y1,500 fast-food sushi from a chain) but to compare it favorably to Bentenyama or the best sushiya in the US is incomprehensible. Also, there is no "dual menu" and "dual quality" system at Bentenyama that favors Japanese customers over foreigners. There is a system that favors regulars over first time customers. This is the case at any sushiya, though. Bentenyama's reputation as an excellent sushi shop is very well established. As a matter for fact, Jiro Ono-san has said that it is his favorite sushiya to visit as a customer. Sorry you didn't enjoy your experience there. I've always loved it, and everyone I've sent there has loved it as well.