You could always drop the seats off at a Yamato transport or other delivery service and have them deliver it to the airport for you to pick up when you leave. Depending on the size of the box, it might only be $20 or so. I think for Takkyubin you can only ship up to 160cm (L+W+H) max.
Services, Size and Rates for TA-Q-BIN (For Personal Customers) | YAMATO TRANSPORT CO., LTD.

 

Thanks Gawa!
The boxes arent too big. like 34-36 inches usually.
Well big for some.

 

How large are you imagining cabs to be in Japan? Haha.

Just ship it back?

 

I considered doing this exact same thing when I was in Yokohama: fly back with an ASM ruby strapped to my body so I'm double seated on the airplane

 

I saw this on the ASM blog


Also some new CFRP parts S2000

 

I saw that photo as well on their blog. I chuckled as it reminded me of this conversation.

 

I'm guessing the dimensions of that box are just slightly too large for check-in luggage

 

sept my03 a few events ago in aug. PC: shek.mate

 

Does anyone know if a copy of the ASM 70mm titanium was ever made? Maybe by some obscure Japanese company?

I'm looking at one that may be ASM and just wanted to check. Thanks.

 

You mean this one? https://www.s2ki.com/forums/socal-sw.../#post24369896
That looks real to me. Comparison pictures: Go Tuning Unlimited