Northern Japan offers amazing scuba diving experiences in Hokkaido and Tohoku. Hokkaido features diverse dive sites like the Shakotan Peninsula and Shiretoko, with ice diving and sea lion encounters. Tohoku has unique areas where warm and cold currents mix, attracting many fish species. Notable dive sites include Usujiri, Ofunato, and Shizugawa, suitable for both beginners and experts. With rich biodiversity and stunning underwater landscapes, these regions are perfect for adventure.