I placed a new title on this as the inquiry would be really meaningless with the original title.
For stuff going to Japan and trackable, I would try Overseas Courier Service.
I am not sure on frame sized stuff of the current tariff. They do have a "Fed Ex" sized box, at a reasonable rate considering the speed and accountability.
I will preface this by saying in the Los Angeles area, they will pick up, Areas outside of major Japanese corporation interests, it might be tougher.
John Jorgensen
Torrance Ca USA
Where Toyota has a major HQ.