My apt. is less then a 10 minute walk from Japantown and I'm often craving inexpensive udon or soba, tempura, ramen, tonkatsu, tofu, unagi, bentos or cheap omakase lunch specials, but have never taken the time to really explore the restaurants and plaza in this neighborhood. I realize that there's generally considered far better Japanese elsewhere in the city (seems odd; is that because of high rents or commercialization or something?) but I'd be very satisfied with any recommendations for just good and cheap places that don't necessarily have to be the best in town. Preferably with authentic flavors. I'm not asking for mediocre or bland recommendations to be clear... I'm just asking for the best of what's accessible in the area. Is there anything worth the walk down Van Ness from my apartment? Are there any reasonably priced counter stalls in the Plaza? A good independent grocery or conrner store perhaps where one could get bento style lunches or cheap but fresh sashimi, hand-pulled noodles, etc? Any tips at all would be really appreciated!