nill to nothin

Nothing, architects in Japan get near nothing.

can anybody tell me a real number of money?

The best way and probably only way to find out what salary an office is offering you for a particular position is to ask that office. They are the only ones who know. Any comments you get from anonymous people on the internet will just be speculation. All that being said it is common knowledge that in Japan interns are expected to work extremely long hours for very little to no compensation. If that is going to be an issue for you you might want to ask your Mom and Dad for an allowance.  

It is said that internships in Japan are dificult to obtain (especially if you don't know japanese, what I guess it's your case), and they are low paid, or unpaid, so you'll have to negotiate your salary and decide what would be the minimun you would accept.

Also make sure to know how many hours a day/week do they expect you to work.

Just for my curiosity, what country are you from?

From what I've read and heard, internships in Japan almost always mean no pay.  And by that I mean $0, no paycheck, no stipend.  You'll probably have to supply your own computer too.

The 'open desk' period is no pay - it's basically a glorified office visit for a few weeks.  Some firms will offer a stipend to help cover commute.  The step after is an internship - often filled by students.  Note that many people live at home with family through school and a few years after school.  Cost of living in most places (including Tokyo) can be very reasonable, as the decades long recession has had deflation in effect.  That being said being a foreigner and not speaking the local language will put you at a huge disadvantage.

Have you asked what the potential might be (even a range)?  I would imagine that office would at least give you some idea, given that you need to move, they are a pretty stand up place.

Kengo kuma pay for intern,It is 50000 jpy for first month, 120000 from seceond month.

All i want to know is about the salary when you are a formal staff.I just want to get a idea of it.i know it is low, but how low it will be?

Kengo Kuma is one of rare architect offices in Japan who pay the interns. (Even the small offices they dont pay)

Normal staffs get the starting salary at 170,000-250,000 yen per month. Enough to live in Tokyo but not too comfortable.

Architects dont earn good money in Japan sothat forget about money if you wanna go here. But you can learn a lot, even at a small office.

I have a co-worker who worked at Kengo for several years. Unless you're willing to sacrifice your pay, and work/life balance. Tokyo is expensive unless you live frugally. I personally wouldn't recommend it unless you're seriously passionate about architecture. The working culture in Japan is infamous for its long hours, overtime, and high expectation of loyalty to the company. Its a nice office though.

anybody here worked at nikken sekkei / nihon sekkei / azusa sekkei / kume sekkei before? would appreciate any comments/feedback.