Let's start with some giant swords.
- https://www.reddit.com/r/SWORDS/comments/rbg8bd/the_norimitsu_odachi_15th_century_is_a_huge_sword/
- https://www.reddit.com/r/SWORDS/comments/xxjv60/the_hajanoontachi_and_a_replica_larger_than_the/

Seeing it in person:
https://kudamatsu-kanko.jp/花岡八幡宮～破邪の御太刀（はじゃのおんたち）/
Hanaoka Hachimangu Shrine
https://maps.app.goo.gl/GkEivkqt7rT2pzNm6