Its online shop offers improved and ornamental medaka, organized by life stage and size, including adult fish, juveniles, and fry. The selection also includes live foods and aquarium supplies designed to help keep fish healthy and thriving.

Key products include water fleas (Daphnia), paramecia, green water, PSB, and euglena, available in different sizes and multipacks. The shop also offers bundled packs combining several of these breeding essentials. Its content highlights how live foods can support young fry and encourage natural, active behavior in fish. medatomo presents the individuality of each medaka—their distinctive colors and patterns—as a source of enjoyment and everyday calm, serving both individual hobbyists and business customers.

Customers can browse featured products, new arrivals, and weekly sale items. The site advertises free delivery on orders over ¥4,000, secure payment options, weekday customer support, and returns subject to the product’s condition and the stated time limit after delivery.