The Bank of Japan has upgraded its economic assessment for certain regions. Tohoku and Shikoku are the areas that have seen an improvement in their economic outlook. Strong demand for technology is a key factor in this positive assessment.

Further details about the Bank of Japan's decision are available from the source. The upgrade suggests that the regions are experiencing economic growth, driven by the tech sector.

The source provides more information on the Bank of Japan's assessment and the factors contributing to the improved economic outlook for Tohoku and Shikoku.