An old Japanese aerogramme is not a current ¥90 worldwide mailing service. Japan Post ended aerogramme sales and handling on September 30, 2023. Its announcement says the stationery can still be used as mail with additional postage as necessary; its current aerogramme page also continues to advertise an exchange into other postal products without an exchange fee, for the time being. Japan Post: discontinuation announcement, current aerogramme notice
The useful decision is therefore whether to use the stationery under today’s applicable mail rules or ask about exchanging it. This is desk research, not a tested mailing or counter transaction.
First identify the item in your drawer
An aerogramme is folding writing paper that also forms its own envelope. Do not confuse it with an international postal postcard. The 2023 announcement ended the aerogramme service but ended only sales of international postal postcards; it explicitly distinguished the continued use of postcards already purchased. Japan Post: announcement, sections 1 and 2
Keep the item intact while deciding. Record what it is, the printed postage value, whether it has been used, and whether its postage area is damaged. Do not cut out the printed postage or assume the exchange counter will accept every condition of stationery. This is a preparation suggestion, not a claim that damaged or used items qualify.
If you want to send it, calculate the missing postage from the current category
The old product name does not establish today’s final postage. Show the prepared item and destination to the counter so that its present category, size, weight and postage value can be checked. Japan Post’s current international letter service distinguishes standard and nonstandard items by dimensions and weight. Japan Post: international letters
For a hypothetical calculation, suppose the counter confirms that an item’s usable printed postage is ¥90 and the applicable total charge is ¥160. The top-up is ¥160 − ¥90 = ¥70. These are example inputs, not a quotation for a particular country or an assurance that your item qualifies.
This calculation explains why adding a guessed stamp is a poor first step. You need both the current required total and the accepted existing value. An old advertisement saying “worldwide” does not supply either answer for the finished mailing today.
If you want to exchange it, use the special notice
The current aerogramme page still describes a fee-free exchange arrangement beginning October 1, 2023, with no fixed end date stated there. “For the time being” should not be rewritten as a permanent promise. Recheck it before a future visit. Japan Post: current exchange notice
The original announcement specifies post offices excluding simple post offices and Yu-Yu counters for this arrangement. It describes exchange into other postal products, not cash redemption. Japan Post: exchange location and scope
Bring the original item to a suitable postal counter and explain the choice you want assessed:
この航空書簡を使う場合の不足料金と、無料交換の対象になるかを確認したいです。
“I’d like to check the additional postage if I use this aerogramme, and whether it qualifies for the fee-free exchange.”
If you have several, count them and keep different printed values separate. That lets you compare the actual options without treating the ordinary stamp-exchange fee table as the rule for this special discontinued product. The condition of individual items, the precise replacement combination and the postage for your destination remain counter-specific checks.