utilities are about another Y10000/month.
10,000 yen was my water bill ALONE this month, with a wife and 2 small kids.
Gas (because we aren`t using the heaters any more) was down to 15,000.
Electricity usually runs about 9,000 - 12,000 yen.
Bear in mind that Japanese mainline F/O`s are on about USD8-10,000, and Captains considerably more, and then the fact that almost all of them can afford only one house, one wife, and 1 or 2 kids, and you should be able to realise that the cost of living in (capital cities) Japan is VERY expensive.
The Japanese themselves understand this, but apparently the recruiting agencies do not!