Im disappointed too. Well, I have a couple of realistic suggestions below as food for thoughts ... (some amateur experience with Kendo in the childhood) * Add

Im disappointed too. Well, I have a couple of realistic suggestions below as food for thoughts ... (some amateur experience with Kendo in the childhood) * Add jagged ribs that prevent the attackers from grabbing your unbrella by bare hands. When grabbed, pulling it will cut their palm * Make the fabric shark skin that similarly damages their palm when rubbed * Make it actually heavy not light * Make the grip thicker * Make the grip longer enough for both hands * Add a grip guard. This actually cause a stronger piercing force because it pushes against the grip guard rather than relying on the palm friction This [1] may be indeed practical. [1] https://www.amazon.co.jp/%E3%83%A6%E3%82%BF%E3%82%AB%E3%82%A8%E3%83%83%E3%82%BB-YS-014-0-%E6%97%A5%E6%9C%AC-%E3%82%B5%E3%83%A0%E3%83%A9%E3%82%A4-%E5%88%80%E5%82%98/dp/B0090CFHK2 https://www.amazon.co.jp/%E3%83%A6%E3%82%BF%E3%82%AB%E3%82%A...