Wild Yet Genius: Japan’s Most Unusual Inventions

4. Umbrella Locks

What it is: A bike-lock-style system for umbrellas Invented: 2018 Average Cost: $0

At malls and shops, visitors click their umbrellas into a free lock, preventing theft and freeing hands while they browse.

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Twitter.com/YYC_Svetlana/Umbrella Locks

Rainy cities worldwide could use this simple, sensible idea.