top ecommerce sites in japan.
updated apr 202620 retailers · graded on the ecommerce grade score
Japan's ecommerce market is dominated by established marketplaces and specialized retailers. Rakuten leads as the largest platform, followed by Amazon Japan and Mercari's resale segment. Fashion-focused ZOZO, price-comparison site Kakaku, and electronics retailer Bic Camera represent category strength. Direct-to-consumer brands like Muji, Uniqlo, and Nitori demonstrate strong vertical integration. Cosme.net captures the beauty segment, reflecting Japan's segmented retail ecosystem.
“Japan's largest cashback marketplace: connects millions to products while rewarding purchases through points conversion.”
eg score85A
82,246,653 est. monthly organic visits
“Amazon Japan: E-commerce marketplace serving Japanese consumers; second-largest retailer; operates custom platform with broad product selection.”
eg score85A
66,619,425 est. monthly organic visits
“Mercari: Japanese mobile marketplace for peer-to-peer buying/selling of used goods, fashion, and collectibles.”
eg score82A
9,483,606 est. monthly organic visits
“Japan's largest fashion marketplace offering 500+ brands, serving style-conscious consumers seeking curated Japanese and international apparel.”
eg score78A-
4,940,870 est. monthly organic visits
“Japanese price comparison site for electronics, appliances, and services; helps consumers find lowest prices across retailers.”
eg score78A-
15,265,169 est. monthly organic visits
“Biccamera: Japan's sixth-largest electronics retailer offering cameras, computers, and consumer tech across physical stores and online.”
eg score74B+
4,694,993 est. monthly organic visits
“Muji: Japanese minimalist homeware and apparel retailer offering simple, functional designs for quality-conscious consumers globally.”
eg score74B+
5,256,075 est. monthly organic visits
“Cosme: Japan's largest beauty e-commerce platform, serving cosmetics shoppers with reviews, rankings, and curated product selection.”
eg score73B+
10,490,408 est. monthly organic visits
“Uniqlo: Japanese casual apparel retailer offering minimalist basics and seasonally-innovative fabrics for globally-minded consumers.”
eg score70B+
4,535,414 est. monthly organic visits
“Nitori Net: Japan's largest furniture retailer offering affordable home furnishings online to value-conscious homemakers and renters.”
eg score70B
7,934,128 est. monthly organic visits
methodology
The Ecommerce Grade (EG) Score is our 0–100 composite grade blending five signals per retailer: organic traffic strength (40%), domain authority (25%), cross-source market presence (20%), keyword breadth (10%), and year-over-year growth (5%). Scores are country-normalised so retailers within a market are directly comparable.
Inputs are compiled from public domain intelligence, organic traffic estimates, tech-stack signals, and legacy editorial rankings. Platform detection uses homepage HTML patterns.
Last refreshed: apr 2026.