/doesthemath
A surplus of ¥280000 = £1650
Assuming you pay, say... £450 rent and about £200 on everything else, that's £2300 a month or around $3800.
£2300 X 12 = £27600 or $45700 per annum, post tax.
Assuming the average tax rate is 30%, then £35880 or just under $60000, pre tax.

Holy shit... I assume IT careers are... well paid outside the UK..?