Mat talking their own
Mat talking their own(自分語りマット;Jibun-katari-mat) was a mat that once existed in front of ちばけんま(Japanese).
The large text that read ("HASEGAWA") was seen on the mat, and was named "自分語りマット" by the actions of Hasegawa Ryota. Three types are known to exist.
The mat is made-to-order by the DUSKIN corporation, and is rotated regularly so that one could be cleaned while the other could be used.
See also 「マツドマッドマットマン(Japanese)」
On October 14th 2014, images showing a 悪芋(Japanese) with the mat was posted in Kirkland(Japanese).
A name (長谷川幸恵, Hasegawa Yukie) was found on the bottom of the mat, leading to the speculation of the name as that of the mother of Hasegawa Ryota.