In Aus, as a non-resident for tax purposes, you can claim reduced rates of Withholding on various types of income in Australia under the Japan Australia Tax Treaty.
The Text of the Japan - Australia Tax Treaty is here
https://www.mof.go.jp/tax_policy/summar ... 00131b.pdf
These are probably the most relevant sections as an individual:
Article 10 - Dividends
According to Article 10, Paragraph 2(b), as a Resident of Japan for Tax Purposes, you should be able to claim a reduced amount of Withholding Tax on Dividend Income in Australia of 10%, instead of the standard 30%.
Article 11 - Interest
According to Article 11, Paragraph 4, as a Resident of Japan for Tax Purposes, you should be able to claim a reduced amount of Withholding Tax on Interest Income in Australia of 10%
Article 17 - Pensions and Annuities...
Article 17
PENSIONS AND ANNUITIES
1. Subject to the provisions of paragraph 2 of Article 18, pensions and other similar remuneration paid periodically to an individual who is a resident of a Contracting State (i.e. Japan...) shall be taxable only in that Contracting State.
2. Annuities paid to an individual who is a resident of a Contracting State shall be taxable only in that Contracting State.
3. Lump sums in lieu of the right to receive a pension or other similar remuneration, or to receive an annuity, paid to an individual who is a resident of a Contracting State shall be taxable only in that Contracting State.
However, such lump sums may also be taxed in the other Contracting State if they arise in that other Contracting State.
4. The term “annuity” means a stated sum payable periodically at stated times during the life or during a specified or ascertainable period of time under an obligation to make the payments in return for adequate and full consideration in money or money’s worth.
These sites in Aus refer:
https://www.ato.gov.au/business/payg-wi ... ts/?page=5
https://www.ato.gov.au/individuals/work ... variations
https://www.ato.gov.au/Forms/PAYG-withh ... plication/
You should submit PAYG Withholding Variation Application (Online or Paper NAT 2036) every year to reduce the amount of any pay as you go (PAYG) tax withheld from income paid to you in the application year, and the payer (Aus Broker, etc.) can't vary the withholding rate until they receive an official variation notice from the ATO. You can submit the application in April for the following Tax Year starting in July.
However, the Superannuation is a Public Pension, and so is taxed very favourably in Japan.
If you take a Lump Sum, this comes under the 'Retirement Income Taxation' 退職金 provision.
If you haven't received a Lump Sum in the past, then you received a Special Deduction of 400,000 per year for the first 20 years and 700,000 per year over 20 years, to the full number of Years of Service. (This may also be taxable in Aus, see para 3 above, but you cannot use a Foreign Tax Credit for Lump Sum). (If you have received another Lump Sum, recently, the Special Deduction will be adjusted down)
The remaining amount after deduction of the Special Deduction is then divided by 2 (Half) to achieve the Taxable Amount.
This is then then taxed according to the Standard Marginal Income Tax Rates below, but this is treated completely stand-alone, so has no impact on, or is not impacted by your other income in the same year.
e.g. If you received a Lump Sum after 23 years of service, the first Y10.1M (20 x 400,000 and 3 x 700,000) would be completely tax free. i.e. the total taxes (National, Reconstruction, and Residents' Taxes) would be Y0.
Anything over the Y10.1M would be halved and then the Half would be taxed according to the Standard Marginal Income Tax Rates
Band ― National ― Reconstruction ― Residents' Tax Rates
Income tax rates
Marginal Tax rate (%) National - Reconstruction - Residents' Taxes = Total
Under 1,949,000 ― 5% ― 0.105% ― 10% = 15.105%
1,950,000 ― 3,299,000 ― 10% ― 0.21% ― 10% = 20.21%
3,300,000 ― 6,949,000 ― 20% ― 0.42% ― 10% = 30.42%
6,950,000 ― 8,999,000 ― 23% ― 0.483% ― 10% = 33.483%
9,000,000 ― 17,999,000 ― 33% ― 0.693% ― 10% = 43.693%
18,000,000 ― 39,999,000 ― 40% ― 0.84% ― 10% = 50.84%
Over 40,000,000 ― 45% ― 0.945% ― 10% = 55.945%
So very favourable.
Another way to think about it would be that anything over the Special Allowance Min(N,20) * 400,000 + Max(N-20,0) * 700,000
Taxed at
Retirement Lump Sum Taxation
Marginal Tax rate (%) National - Reconstruction - Residents' Taxes = Total
Under 3,899,000 ― 2.5% ― 0.0525% ― 5% = 7.5525%
3,900,000 ― 6,599,000 ― 5% ― 0.105% ― 5% = 10.105%
6,600,000 ― 13,899,000 ― 10% ― 0.21% ― 5% = 15.21%
13,900,000 ― 17,999,000 ― 11.5% ― 0.242% ― 5% = 16.742%
18,000,000 ― 35,999,000 ― 16.5% ― 0.345% ― 5% = 21.845%
36,000,000 ― 79,999,000 ― 20% ― 0.42% ― 5% = 25.42%
Over 80,000,000 ― 22.5% ― 0.4725% ― 5% = 27.9725%
(equivalent of twice the width of the band at half the band tax rates as shown above)
According to the Tax Treaty Article 17 above, Regular Pension Payments should not be taxed in Aus. You probably need to file the forms above to get paid Gross.
Pension Income 年金収入.
In Japan, Pension Income is treated as Miscellaneous Income and is aggregated with other Aggregate Tax Method income in the Tax Year.
Your standard deductions apply; Personal, Dependants', and other regular allowances.
Then, there is also the Public Pension Allowance, which applies to Public Servant Pensions, Approved Fund Pensions, National Pensions, or other Pensions paid under Social Insurance Schemes.
Miscellaneous income
Public Pensions
Income of the National Pension, Employee Pensions, Defined Benefit Corporate Pensions, Defined-Contribution Pensions, other Public
Pensions and certain Foreign Pensions, etc.
雑所得
公的年金等
国民年金、厚生年金、確定給付企業年金、確定拠出年金、恩給、一定の外国年金などの所得
but not
Others (Not eligible for the Public Pension Allowance)
Other income, such as Annuities (pensions) under Life Insurance Contracts.
その他
生命保険の年金
The amount of the Public Pension Allowance depends not only on age, but also on your Gross Income and Gross amount of Pensions received in the Tax Year.
https://www.nta.go.jp/taxes/shiraberu/s ... df/002.pdf
Pages 11-12
https://www.nta.go.jp/taxes/shiraberu/s ... df/050.pdf
Page 22
You are required to file a return for Foreign Pensions.
This forum does not support Tabs so is very difficult to present tables... Table Columns separated by ---
Public Pension Deduction.
From 1 Jan 2020...
The amount is calculated based on Age and Total Gross Pension off-set against the total Gross Income from all other sources in the year.
Gross Annual Pension --- Other Income < Y10M --- Y10M to Y20M --- > Y20M
Under 65.
Less than 1,300k --- 600k --- 500k --- 400k
1,300k to 4,100k --- 25% + 275k --- 25% + 175k --- 25% + 75k
4,100k to 7,700k --- 15% + 685k --- 15% + 585k --- 15% + 485k
7,700k to 10M --- 5% + 1,455k --- 5% + 1,355k --- 5% + 1,255k
Greater than 10M --- 1,955k --- 1,855k --- 1,755k
Over 65.
Less than 3,300k --- 1,100k --- 1,000k --- 900k
3,300k to 4,100k --- 25% + 275k --- 25% + 175k --- 25% + 75k
4,100k to 7,700k --- 15% + 685k --- 15% + 585k --- 15% + 485k
7,700k to 10M --- 5% + 1,455k --- 5% + 1,355k --- 5% + 1,255k
Greater than 10M --- 1,955k --- 1,855k --- 1,755k
See the Tables reproduced here:
https://www.tax.metro.tokyo.lg.jp/book/ ... ok2021.pdf
https://www.tax.metro.tokyo.lg.jp/book/ ... k2021e.pdf
Page 8.
Calculating the Public Pension Plan Deduction (Calculation Table)