Toyota said its production in China surged 54.5% in the month to 72,985 vehicles. Nissan built 114,942 vehicles, up 48.2%. Honda increased output 40.3% to 71,199 vehicles.
To spark consumer demand in the world's second-largest economy, new marketing has been introduced to ease consumer concerns about owning Japanese cars. New and affordable models have also been rolled out.
Japanese car makers' 15.2% combined market share in the first eight months of this year still fell short of the 18.5% share in the same period a year earlier. The falloff benefits U.S., European and Korean rivals in their drive to get bigger slices of the market.
Toyota, Nissan and Honda cut production in September 2012 by between 20% and 40% as the consumer backlash prompted them to temporarily close local factories.
After political tensions flared, January was the first month that all car makers made more cars than in the same month in 2012, due merely to the greater number of operating days in the month.