TOKYO—U.S. memory chip maker Micron Technology Inc. will build a new factory at its Japanese production site in Hiroshima at a cost of 800 billion yen ($7.0 billion), the Nikkan Kogyo newspaper reported on Wednesday. The new facility will make DRAM chips, which are widely used in data centers, with production set to begin in 2024, the report said, without citing sources. Micron officials in Japan were not immediately available to comment. COVID-19 pandemic stay-at-home demand for electronic devices is causing shortages of non-memory chips that has forced some manufacturers, such as automakers and smartphone makers, to curtail production. That has also reduced sales of DRAM memory chips, but some industry watchers expect demand to rebound helped by an expansion of data centers. The report comes after chip giant Taiwan Semiconductor Manufacturing Co. (TSMC) announced plans last week to build a plant in Japan, that media reports said may be …