Issue with calculating crypto taxes from BitFlyer on domestic tax calculation sites

I'm getting errors when adding BitFlyer trade history CSV on Japanese crypto tax calculators (gtax and cryptolinc). Meanwhile the international sites can process it alright (summ and cryptact).

Has anyone else run into this problem? Any idea on what could be causing the issue?

I made the mistake of having more than 100 transactions in 2018 and now I all the foreign sites want me to pay for the "expensive" tier to calculate my taxes every time. My gains are very small and it don't think it justifies paying for the expensive tier. Am I stuck on this loop forever? Should I delete my BitFlyer account and start again from scratch so I don't get the stupid 100+ transactions from 2018?

Is there a simple excel script or github program to just do the basic calculation without having to rely on these tax sites?

by nexflatline