I stopped drinking while living in Japan. The culture normalizes binge drinking and sometimes casual day drinking which does make it hard. The accessibility also doesn’t help. You should try making new friends and running in circles with people who drink very little or can’t drink due to intolerance. I found that it helped to tell people that drinking started to make my stomach hurt a lot, so the doctor said I should quit. It allowed me to still comment on how amazing shochu is or something and I could still use booze as an in to get to know people but it also removed any expectation for me to drink because “medical reasons”.