A week after stopping deliveries, Toyota Motor’s Daihatsu unit on Tuesday shut down production lines at its four factories in Japan. The move comes after itr was revealed the company had fudged safety tests in over 64 models and three vehicle engines, including 22 models and an engine sold by Toyota. The affected models include some from Mazda and Subaru sold in Japan, as well as models from Toyota and Daihatsu sold worldwide. Daihatsu announced that it had shut down its production units in Shiga, Kyoto, Oita and Osaka, and some media reports predict that it will remain closed through January….