Just to add to my above post, I looked into the "
Gakko No Kaiden G" anthology that "Katasami" and the "4444444444" shorts are supposedly derived from.
An entry on "School Ghost Stories" ("Gakko No Kaiden" or in Japanese found following characters:
学校の怪談 ) can be translated to English here: https://ja-m-wikipedia-org.translate..._tr_pto=nui,sc
There's a movie sub-section that can be found here:
https://ja-m-wikipedia-org.translate..._tr_pto=nui,sc
Movie History from this link Summed up As:
1995: School Ghost Story
1996: School Ghost Story 2
1997: School Ghost Story 3
1999: School Ghost Story 4
2014: School Ghost Story Cursed Spirit
*Related Games/Books/Soundtracks link above
The TV serial and specials spun-off from this serial sub-section can be found here:
https://ja-m-wikipedia-org.translate..._tr_pto=nui,sc
TV History from this link summed up as:
1) Jan. 14th 1994 to March 25th 1994 an 11 episode Serial entitled "School Ghost Story" was broadcast on Konsai TV in Japan that I can find very little information about. Supposedly, on August 19th 1994 there was a VHS tape with the 1st 10 episodes on it but the 11th was never put on film for 1 reason or another.
This 11 episode series focusing on horror was the final work Kansai TV production "Hankyu Drama Series ".
2)July 1996 a spinoff anthology movie called "School ghost story R".
3) July 1997 a spinoff anthology movie called "School ghost story F"
4) July 1998 a spinoff anthology movie called "School ghost story G". This is where the "Katasami" and "4444444444" shorts debuted.
5)March 1999 School Ghost Story Spring Haunting Special (School Ghost Story Haru No Tatari Special)
6) March 2000 School ghost story Haru no Noroi Special
7) March 2001 School ghost story Spring Mononoke Special
8) August 2020 Monster Share House Special
*Mobile, Gaming, and Anime were derived from these TV specials as well as described at link above