I had the same question before and this is what i got:
That's great to hear. I'm glad you got your reply.
Back to your question, it's around 25%, but slightly lower than that. You will get slightly more than 165,000, probably closer to 170,000-180,000. Income tax, pension, and health insurance typically come up to between 30,000 to around 50,000 yen per month.
I'll take 170,000 as your take home pay for easy calculation. After taking off 68,000 yen, you'll be left with 102, 000. I'll assume utilities and internet are not included.
If transport is not paid, there goes another 20,000-30,000 yen depending on how far you're staying, and which lines you're taking/getting on or off etc. Cycle to work if you live nearby. That would save you a lot.
As for food, convenience store is cheap. Onigiri costs about 110-150 yen each, bento boxes about 450 yen to 600 yen. But if you just survive on convenience store meals for lunch and dinner, you'll need an average of 1000 yen/day. That adds up 30, 000 yen per month.
If you go to the supermarket about 1 hour to 30 min before closing time, they'll start slashing the price. It's a good time to go, but you might not have a lot of choices left.
The best solution is to cook on your own and save up leftovers for the next day. You'll save a lot.
Now going back to our calculation earlier;
Rent: 68, 000
Food: 30, 000
Utilities: 5000-10,000 depending on usage (AC/heater)
Mobile: 4000 yen (I got a line only, not phone) With phone, expect to pay double.
Transport: 30, 000
Misc: 10,000
Total: 152,000 yen.
You'll survive, but you won't be able to save up any substantial amount, or travel much.
Anyway, this is just a very rough estimation. It depends on personal usage actually.
From:
http://japan-guide.com/forum/quereadisplay.html?0+125041Where will you work and what position?
