https://toyokeizai.net/articles/-/641229?page=3
https://tatsusan.com/blog/column/%E3%80%8C%E5%B9%B8%E3%81%9B%E3%80%8D%E3%81%AF%E3%81%A4%E3%81%8B%E3%82%80%E3%82%82%E3%81%AE%E3%81%A7%E3%81%AF%E3%81%AA%E3%81%8F%E3%80%81%E6%B0%97%E3%81%A5%E3%81%8F%E3%82%82%E3%81%AE/
https://mentally-jp.cdn.ampproject.org/v/s/mentally.jp/well-being/3019?amp=&_gsa=1&_js_v=a9&usqp=mq331AQKKAFQArABIIACAw%3D%3D#amp_tf=%251%24s%20%E3%82%88%E3%82%8A&aoh=16729224643228&referrer=https%3A%2F%2Fwww.google.com&share=https%3A%2F%2Fmentally.jp%2Fwell-being%2F3019
https://www.nikkei.com/article/DGXZQOUC121Y30S2A211C2000000/