Wa why the animu name so long?!!!   https://myanimelist.net/anime/60140/Kanchigai_no_Atelier_Meister__Eiyuu_Party_no_Moto_Zatsuyougakari_ga_Jitsu_wa_Sentou_Igai_ga_SSS_Rank_Datta_to_Iu_Yoku_Aru_Hanashi  

You visited those shops in Temple Street like Lau Choy Seng and Sia Huat? I remember buying some knives from around there. They have those nitrided stuff you are looking for. Check the pricing, and then see. We have regular carbon steel and ss stuff at home, so no experience with the nitrided stuff

this is Nitriging