The NTA English Page regarding the Exit Tax is totally inadequate.
The NTA Japanese Page regarding the Exit Tax is here:
https://www.nta.go.jp/taxes/shiraberu/t ... u/1478.htm
2 国外転出時課税
国外転出時課税とは、国外転出をする時点で、1億円以上の対象資産を所有等している一定の居住者に対して、国外転出の時に、対象資産の譲渡等があったものとみなして、対象資産の含み益に対して所得税が課税される制度です。
(1) 対象者
この制度の対象者は、次のイ及びロのいずれにも該当する方です。
イ 国外転出の時に所有等している対象資産の価額等(未決済信用取引等又は未決済デリバティブ取引については、決済をしたものとみなして算出した利益の額又は損失の額に相当する金額)の合計額が1億円以上であること。
ロ 原則として、国外転出をする日前10年以内において、国内に住所又は居所を有していた期間の合計が5年を超えていること。
(2) 対象資産
この制度の対象資産には、有価証券(株式や投資信託など)(※)、匿名組合契約の出資の持分、未決済の信用取引・発行日取引及び未決済のデリバティブ取引(先物取引、オプション取引など)が該当します。
(※) 株式を無償又は有利な価額により取得することができる権利を表示する一定の有価証券で国内源泉所得を生ずべきものを除きます。
(3) 申告手続等
この制度の対象となる方は、次のイ又はロの場合に応じ、それぞれその手続をする必要があります。
イ 国外転出の時までに、納税管理人の届出をした場合には、国外転出をした年分の確定申告期限までに、その年の各種所得に、この制度の適用による所得を含めて確定申告及び納税をする必要があります。
ロ 納税管理人の届出をしないで国外転出をする場合には、国外転出の時までに、その年の1月1日から国外転出の時までにおける各種所得に、この制度の適用による所得を含めて準確定申告及び納税をする必要があります。
Google Translate...
2 Taxation when moving out of the country
Taxation at the time of moving out of the country means that a certain resident who owns the target assets of 100 million yen or more at the time of moving out of the country is considered to have transferred the target assets at the time of moving out of the country. It is a system in which income tax is levied on the unrealized gains of the target assets.
(1) Target person
The target person of this system is a person who falls under any of the following a and b.
(A) Value of the target asset, etc. owned at the time of moving out of the country (For unsettled margin transactions, etc. or unsettled derivative transactions, the amount of profit or loss calculated assuming that the transaction has been settled) the total amount of is 100 million yen or more.
(B) As a general rule, the total period of having an address or residence in Japan before moving out of the country exceeds 5 years within the last 10 years
(2) Target assets
Assets covered by this system include securities (stocks, investment trusts, etc.) (*), equity interests in silent partnership contracts, unsettled margin trading / issue date trading, and unsettled derivative trading (futures trading, option trading). Etc.).
(*) Excludes certain securities that indicate the right to acquire shares free of charge or at a favorable price and that should generate domestic source income.
(3) Declaration procedure, etc.
Those who are eligible for this system are required to complete the procedures according to the following cases (a) or (b).
(A) If the taxpayer has filed a tax return by the time of moving out of the country, the tax return will be filed by the final tax return deadline for the year of moving out of the country, including the income from the application of this system. And you need to pay tax.
(B) If you move out of the country without notifying the tax administrator, the income from the application of this system will be included in the various incomes from January 1 of that year to the time of the outing by the time of the outing. It is necessary to file a semi-final tax return and pay taxes.
Therefore, if you have more than 100 million yen, you would need to contact the Tax Office and ask them if you would need to declare the Crypto Assets when you complete the Exit Procedure before leaving Japan.
The answer is probably 'Yes'.
You would not be forced to sell the Assets, but would have to Mark The Assets to Market on the day of your departure As If you had sold them on that day, and pay the taxes that would be liable if you had sold on that day.
If you only have 60 million yen in total Assets, then you won't need to complete the Exit Procedure, and you can take it all with you.
If you terminate your Residency, then you will no longer be liable for Japanese Taxes.
If you choose to return to Japan, you will be treated as A Permanent Resident For Tax Purposes when you have 5 years in Japan within the last 10 years.