Tofu is very good place for bacteria growing because this is first class plant protine. So it's not too good to keep tofu for long time but if you can control non-bacteria place you can keep tofu as long as you want. Then if you want to keep tofu for 1-2 days, you should keep in clean water with no bacteria and bring tofu out only cooking time. Even at UNNO HANA in prepair process we boiled everything such as tofu box and all package also we used antibiotic ligth by TOSHIBA and put ethilalcohal in spoon and put it close to tofu package too. We have 2 ways to keep tofu for 3 days, first use anticeptics but at UNNO HANA we used second way that's baked tofu at 85 C. But, it will make tofu a little bit harder and not good taste. Few days ago someone called that ate KINOKOSHI TOFU that keep in refrigirater for 12 days but still good, and asked that may be we used anticeptics. So it's not like when 3 days passed tofu will suddenly ............ if they have no bacteria if can last for many days. Only apanese eat fresh tofu, Chinese eat .........tofu. If you keep tofu more than 3 days recommend to cook by boil or fry.

Of course, Japanese soybeans is good, I used to make tofu by used Japanese soy bean but farmer always use agrchemical and dry machine too. This process will decrese protein in soybeans and also plus with high import tax, 1 peace of tofu will be 360 yen. Too expensive. The most important thing for Japanese tofu mis not soy bean but it is the way to steaming OK. So Thailand's soybeans are small but have good taste and grow with natural process and also export soy bean to Japan. So Thailand or Japanese soy bean can make delicious tofu.

Water from UNNO HANA shop is non-bacteria, in first day can keep tofu like that but in second day it's better to change water. If can use the water from filter machine will be the best but at least recommend mineral water.

Water from UNNO HANA shop	0.004-0.007 Micron
Japanese water	Average 0.015 micron
Mineral water	Average 0.40 micron
Thailand's water	Average 0.90 mocron

Anyway tofu is fresh food if cook when fresh will be more delicious but Thailand has hot weather so it's better to keep in refrigirater