A new sword has been unveiled in this tweet by the official twitter! The tweet says the following:
"Saniwas, good evening! Today, information about a new toudanshi has been received! A partial image has been published, but details about his implementation in the game will be released next week. Look forward to it!" (translation by Celadonite)
Based on the crest, some people think that this sword may be Gotou Toushirou (後藤藤四郎), or Shinogi Toushirou (鎬藤四郎), though neither are confirmed. What do you guys think?