International shipping from Japan has been very dicey for weeks - much more so than, say, China. There is/was apparently a requirement that cargo not be carried on passenger jets as a load top-up, and that has impacted the already-slowed commercial traffic. And of course they went on full "pause" a few weeks ago, so even if they've restarted it'll be awhile before they go back to full production. So it may be weeks yet.