Bic Camera sells electrical appliances, electronic accessories, mobile phone cases, household items, and even medicines and cosmetics. You can use electronic coupons for purchases of up to 5,000yen. The coupon is valid until September 30, 2020. When you go to Japan, you can save this e-coupon and show to the cashier.
e-coupons are available at all Bic Camera outlets in Japan(including KOJIMA and Sofmap stores) and are presented with a passport to get tax refund.
Plese refer to e-coupon for more details.