Cheap bento store in Kobe?

Hi guys i've been a month livin in Kobe in chuo ku area 30 min walking to sannomiya

Im looking for cheap pre cooked food or bento in this city
Is there any? I know the supermarket sells a lot of these around 380-500\ but if there any cheaper one out there I want to know
Thanks

http://tabelog.com/hyogo/A2801/A280101/R4479/rstLst/RC990401/?Srt=D&Sr...

Origin bento
http://tokyocheapo.com/food-and-drink/origin-bento-wants-to-take-you-f...
6-1-17 Isogamidori, Chuo-ku, Kobe, Hyogo Prefecture
7:00 to 23:00
http://www.toshu.co.jp/origin/
hotto motto
http://sasp.mapion.co.jp/b/hottomotto/attr/?kencode=28

I could be wrong, but I don't think that Origin Bento and Hottomotto sell bento for less than Y380.

Origin lunch and Hotto Motto can buy a lunch at about 380 yen to 500 yen.
If the combination of the rice and the side dishes and may buy even less.
Convenience store bento is also a price of about roughly the same.
If the Kanto region, it is selling a lunch at about 200 yen in the supermarket that OK.
However, OK is not in Kansai.
It is selling a lunch of about 306 yen in SEIYU.
http://www.the-seiyu.com/front/app/catalog/list/init?searchCategoryCod...
Seiyu in Kobe, seems not only Shin-Nagata shop.
According to hypedia, it is a 9-minute train ride from Sannomiya.
5-5-1 Wakamatsu-cho, Nagata-ku ,Kobe City, Hyogo Prefecture
8:00 to 21:45
Also a cheap likely Green's K, but not too close from Sannomiya.
http://www.greensk.jp/index.html
Super La Mu also seems there is a 298 yen lunch, but not too close from Sannomiya.
It is located in Nada.
http://dkt-s.com/area.html?reg=2&pref=28

Thanks, that's more like it!