The city of Seki in Gifu Prefecture has long been famous for sword-making and high-quality kitchen cutlery. Now, as Togech points out, it's becoming famous for ice cream katana.
The basic idea was from a high school student, and according to Asahi Digital, the city's youth made that a reality. A local Japanese confectionary chef makes the ice cream treats, which cost around ¥1000 ($12) and come in bean paste or Japanese citron flavour.
The sword's handle is plastic, but the guard is chocolate-covered cookie. The swords are coated with kudzu starch, which slows the melting process.
— 日本刀アイス【公式】 (@katanaicecom) August 25, 2017
— 関武将隊KUMOAGEHA (@sekibushoutai) June 20, 2017
Though leaving them on a sword stand for a long time is probably a bad idea.
— 流浪民 uıɯnoɹnɹ? (@ruroumin) June 18, 2017
( ｣ﾟДﾟ)｣＜「刃物のまち 関市」の新たな名産でーーーーーす！！ pic.twitter.com/yNQU82QbLH
— 音久@岐阜県関市の眼鏡屋ami店員 (@neku07) August 22, 2017
Currently, the swords are only made in small qualities and on sale locally in Seki, a city worth visiting if you are into katana, whether they're made of Japanese steel or ice cream.
— あやめちゃん改 (@ayamewiz) August 25, 2017
— 音久@岐阜県関市の眼鏡屋ami店員 (@neku07) June 18, 2017