No that is not confirmed. The creators (said in an interview) began the project with a five 年 plan which is not uncommon with tv shows. So the 表示する could definitely run beyond 5 years. Now that the 表示する has been commissioned for the 5 years the can start planning for the possibility of 6.. 7.. 8 etc.
posted 1年以上前
The writers of the 表示する confirmed it last july At San Diego Comic Con. The fifth season s on the way.