Gensen-Choushuu-Hyou (源泉徴収票) is a Japanese version of PAYG payment summary.
The red bit in image above is the overall income before tax (gross income).
The blue bit contains amount after deducting “tax waive”.
Japan lets employee waive certain amount of tax based on the income.
The yellow bit is deduction of tax based on your circumstance. E.g., dependency, insurance, etc.
Last of all, the green bit is the ultimate tax you owe and obliged to pay.
RED = Annual Income before tax
BLUE = RED - “tax waive (給与所得控除)”
YELLOW = BLUE - “deduction claim (各種所得控除)”
GREEN = YELLOW * “tax rate”
Why Gensen-Choushuu-Hyou matters
As you lodge tax return every year in AU, JP requires you to lodge tax return as well.
When you are employed to Japanese company, the company does tax return on your behalf.
Gensen-Choushuu-Hyou is basically the summary report produced by company illustrating your income and tax paid.
Now Gensen-Choushuu-Hyou comes handy when lodging tax return in AU.
If you’re an Australian resident for tax purposes, you are taxed on your worldwide income
So you must declare any foreign income in your income tax return.
NOTICE, fiscal year in Australia and Japan is different.
AU = 1 July to 30 June, JP = 1 April to 31 March
I’ve found this link http://japantaxcalculator.com/ handy when calculating year tax return values in your country.