Yes. Lockers are available in several areas: 1) behind the ticket office, 2) at the right corner of Nami Store Nami Wharf, and 3) nearby the Bike Center. Prices depend on the size of the locker. The dimensions are:
Small: 32cm(h) x 37cm(w) x 47.5cm(d) (\1,000)
Large: 81.5cm(h) x 37cm(w) x 47.5cm(d) (\1,500)
* Those who are staying over with us can keep their belongings at the hotel reception.