Piano Answers

Hi!
I’ve recently fallen in love with the song “Arigatou” by Kokia & I’d love to play it on guitar/piano, so I’m wondering if there’s any chance that someone knows where I can find the chords for this beautiful song? I’ve tried to Google it in English & Swedish with no luck. Unfortunately I’m a beginner at Japanese so I don’t have the skills to understand it even if I managed to find a site for it in Japanese.
Thanks in advance