what visa i will get?

,my husband is in us army and im now applying for visit visa to enter japan. but Im staying there as long as he is there, but visit visa is like only for 90 days, my husband told me I just need to be in japan, and will see the immigration.and he is just waiting for the command sponsorship. how does it related? im confuse

You'll get general visa. Please refer to the link below.

http://www.mofa.go.jp/j_info/visit/visa/04.html

If you will be a military spouse then the regular visa rules do not apply. Depending on what country you are from, you will be able to enter on a 90 day tourist visa, and within those 90 days, and depending on your husbands status, you can apply for SOFA status via his base. If granted you will be allowed to stay in Japan as a SOFA dependant, but without a Japanese visa. Your husband should consult with his base to see if you are eligible. If not then you will have to look into other options, and basically have to qualify on your own for a visa that allows long term stay. Here's some similar threads:

http://www.japan-guide.com/forum/quereadisplay.html?0+61284
http://www.japan-guide.com/forum/quereadisplay.html?0+63379

I've read somewhere that military dependents are exempt from needing a visa, if Military Member is Stationed in Japan. They required you to have a passport and you may have to apply for a alien registration card with your prefecture. This insert is taken form http://travel.state.gov/travel/cis_pa_tw/cis/cis_1148.html

Military/SOFA Travelers: While active-duty U.S. military personnel may enter Japan under the Status of Forces Agreement (SOFA) with proper Department of Defense (DOD) identification and travel orders, all SOFA family members, civilian employees and contractors must have valid passports and, in some cases, SOFA visas to enter Japan. Active-duty military personnel should obtain a tourist passport prior to leaving the United States to accommodate off-duty travel elsewhere in Asia as obtaining one while in Japan can take several weeks. Personnel whose duties will include official travel should also obtain an Official Passport before coming to Japan to avoid delays of up to two months, as these overseas applications must be referred to a special office in Washington, adding to processing times. DOD travelers should consult the DOD Foreign Clearance Guide, DOD 4500.54 before leaving the United States.