A thorough explanation of Weekly ApparelX: "How to Dye Shell Buttons," "Year-End and New Year Notice," and "What Are the Japanese Textiles Gaining Attention Overseas?"
Shell button → https://www.apparelx.jp/search.php?category=BUTTONS&searchitemtype1=貝ボタン
Antiviral and antibacterial materials → https://www.apparelx.jp/search.php?searchtag=SANITARY