Data from the Japan Securities Dealers Association on Monday showed that foreign investors sold the most JGBs in January on record at 4.119 trillion yen ($30.71 billion).

Source: https://financialpost.com/pmn/business-pmn/japan-yields-tick-higher-after-spike-in-u-s-peers-boj-in-focus

The Bank of Japan said on Wednesday it would conduct emergency bond buying, in a move to contain elevated yields, as the 10-year JGBs touched 0.505% for a second straight session, breaching the BOJ's 0.5% cap and reaching the highest level since Jan.

Source: https://gazette.com/news/us-world/asia-equities-fall-on-fear-of-hawkish-central-bank-hikes/article_d3e9cf4d-58c9-5d00-bff5-d1eb32e7795b.html