I found your SOTA alert. I think there are many SOTA chasers who wish to work with you in my local area (JA3 area).
I will give you tips for VHF/UHF operating in Japan.
Calling CQ on “Calling Frequency”,
then QSY to the other frequency within WB Phone bands
The frequency step is 20kHz.
Example of our QSO style
433.000 Calling CQ with announce “will calling cq again on 433.140”
433.140 QSO and Calling CQ on the frequency again and again
We have Field Day Contest by JARL right now. So the bands may be crowded near the calling frequency. Please find available frequency by watch for a while.
Please enjoy SOTA on VHF/UHF bands and your stay in Japan.
See you on the air.