PlayStation 4 sales hit 6m after Japan launch | Eurogamer.net
List of best-selling PlayStation 4 video games - Wikipedia
PS5 vs PS4 Sales Comparison - April 2021
PS4 vs PS3 in Japan Sales Comparison - PS4 Falls Further Behind in August 2020
Sony Japan Discontinues All But One PlayStation 4 Model – GTPlanet
Switch has now surpassed sales of the PlayStation 4 in Japan : r/NintendoSwitch
PS5 Has Been Rapidly Outpacing PS4 Sales In Japan : r/PS5
Japan: sales volume of PlayStation 4 games by distribution type | Statista
PS4 sales hit 88 million, surpass PS3 | TweakTown
PS4 Sales falling in Japan | Attack of the Fanboy
PS4 sales hit 5.3 million ahead of Japan launch, while Xbox One sits pretty at 3.6 million - ExtremeTech
PS4 vs Xbox One vs Switch Japan Lifetime Sales – November 2017
PS4 vs Xbox One vs Wii U Japan Lifetime Sales – May 2017 Update
Report: PlayStation Brand 'In Decisive Decline in Japan,' Research Firm 'Deeply Concerned'
PS5 vs PS4 Sales Comparison - April 2021
PS4 vs Xbox One vs Wii U Japan Lifetime Sales – December 2015 Update
PS4 Sales in Japan Reach Three Millions Milestone
PlayStation 5 Has Surpassed 1 Million Units Sold in Japan
Japanese Sales Charts: Pro Launch Provides a Huge Boost for PS4 - Push Square
PlayStation 4 goes on sale in Japan, and there's no competition - The Verge
Sales-Age - Japan sales week 3: Switch hardware +77% YoY and Software +52% YoY. PS5 hardware ~7K. | NeoGAF
PS4 vs PS3 in Japan Sales Comparison - PS4 Falls Further Behind in August 2020
Research Firm Claims Fall of PlayStation in Japan is "Definitive;" Blames Censorship and not Realizing Japan's Potential - Niche Gamer
Monster Hunter: World Sells 1.35 Million Units In Japan In Its First Three Days - Siliconera
Nintendo's Switch Passes the PlayStation 4 in Lifetime Sales in Japan
