Someone asked me to try and write this tab and since I love Sailor Heart and pretty much all music Jack does I tried my best with it but I know it isn't 100% correct. Listening to the song will really help you get the strum pattern down which isn't too hard it is just remember to hit B a lot when you strum up. Capo on the 5th fret e|---------------------------------------------------------------------------| B|--0--------0---------------------------------------------------------------| G|--0--------0--------4--------2--------0------------------------------------| D|--2--(4x)--0--(4x)--0--(4x)--0--(4x)--0--(4x)------------------------------| A|--3--------2--------5--------3--------3------------------------------------| E|--0--------3--------x--------x--------x------------------------------------| This just repeats over again until the end. Hopefully this help gets a basic chord structure down!
https://primanota.net/misc-unsigned-bands/sailor-heart-lion-metaphor-chords.htm