Legal rules vs. workplace culture
Almost no country makes tattoos illegal for a work visa, and immigration officers are not checking your skin. What actually affects you is workplace culture: some employers, especially formal public-school programmes and some private academies aimed at very conservative parent communities, ask staff to keep tattoos covered during teaching hours.
Other employers — casual language centres, many hostels-adjacent city academies, most private tutoring — genuinely don't care. The variation is employer-to-employer and sometimes even branch-to-branch within the same company, so a blanket answer isn't honest.
