Best way to transfer large savings from Japan to Vietnam?

I’m currently working in Japan but will move back to Vietnam permanently later this year. I’m trying to figure out the best way to transfer all my savings back.

I checked SBI Remit and DCOM, but the ~1 million JPY limit per transfer means I’d need to do dozens of transfers.

Wise seems better, but for Vietnam the limit still looks to be around 3 million JPY per transaction.

At this point, bank-to-bank SWIFT transfer seems like the only realistic option. Has anyone here done this before?

I’ve heard Sony Bank and SBI Shinsei have good FX rates and fees for large transfers. Any experiences or recommendations for this particular situation?

Thanks!