Japan's Top Inventions - Season 2 - Eps 5: Stay-Tight Fasteners
The behind-the-scenes tales of hit products and creations from Japan: this is Japan's Top Inventions. This time, a product used in over 20 countries and regions: stay-tight fasteners, nuts used with bolts in railroads, bridges, towers, and more. When normal nuts experience vibration, they sometimes come loose. But stay-tight fasteners, developed in Japan in 1974, overcame this problem. Learn the dramatic story behind the nuts, including a surprising spot that inspired their creation: a shrine!
About Japan's Top Inventions

Title: Japan's Top Inventions
First Air Date: 2018-03-18
Last Air Date: 2025-02-15
Status: Returning Series
Rating: 0/10 (from 0 votes)
Language: EN
Seasons: 8
Total Episodes: 90
Network: NHK WORLD-JAPAN
Genres: Documentary
Production Companies: NHK, Japan International Broadcasting (JIB)
Synopsis
Japanese inventions are used and loved around the world. Through interviews and reenactments, go behind the scenes and discover how Japanese craftsmanship brought these top inventions into being.