Japan Post had reopening ship to almost all country.
Some country like USA or UK still can't use small packet air, for small size DHL will be the cheapest and fast choose.
We trust no longer future small packet air can be use at almost country.
For Asia like 中国 , Korea , Thailand , Philippine , Malaysia , Vietnam ...etc can use the cheapest one small packet air for shipping.
At this moment Japan post still the best choose, due to calculate by ACTUAL WEIGHT not VOLUME WEIGHT.
Please check detail at Japan Post site.