This product is intended for use overseas, and cannot be used in Japan. This sale is only for those who agree to use overseas only and not use in Japan. Kashimura WT-55E Thin 2-Way Transformer for Overseas Use, USB 220-240V/40V; Function: 220V-240V Region Transformer Weight: 12.8 oz (370 g); Size: 3.0 x 4.2 x 1.3 inches (76 x 107 x 32 mm)