i live near powderhouse square in somerville, and the old "chieko" restaurant on college ave is now gone. the place that's replaced it is called "yoshi's", is more japanese/sushi oriented (chieko had a few sushi items but was more korean food). i've eaten there three times in the last few weeks and am how prepared to pass favorable notice upon it :)
the first good sign was the tea -- a nice toasty gen mai cha. i'm kind of a tea snob, and having something other than "green restaurant tea" was a pleasure. the next thing i liked was a special called "tuna seviche" -- not a canonical sushi dish, and not as marinated as the mexican version, but very tasty; lots of tuna, red onion, nice citrusy dressing. i've also had some very fine raw fish -- toro and salmon especially; not much outside the items i consider standard, but good. and they have the best green-tea ice cream i've had anyplace.
on the downside, the staff can be sort of clueless -- i have had my waiter enter into lengthy conversation with the chef to figure out if they had quail egg for my tobiko (not listed on the menu, but i figured it couldn't hurt to ask -- twice they did have it; once they didn't), and similarly with whether there was shiso to go in my ume maki (there was). on the up side, they're generous; i've had some interesting rolls and a very nice octopus salad appear "gratis". and the prices are between reasonable and cheap -- they sell most combination maki as 3-piece orders for $2.75 or $3, which allows for a bit more granularity than the typical 6-piece roll order; i've gotten decent meals there for between about $12 and $20 (not including tip).
anybody else been there yet?