Kolyma Network Corporation

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Kokonotsuba (9-Leaves) Bulletin Board Software

Kokonotsuba is a closed-source imageboard software developed by the Kolyma Network. It was released on March 14th, 2021, 9channels 16th birthday. The software is a fork of pixmicat, although it has been heavily modified since.

The name "Kokonotsuba" was chosen after the long-lasting tradition of naming imageboard software after the number of leaves on a plant (e.g. Futaba). "9 leaves" was chosen because of 9channel, the genesis of KolymaNET.

Version Numbering System
Version History

All of these versions have been disabled to prevent abuse, they are currently read-only.

Pre-Release (Legacy)
Testing Release (ALPHA) (2021-03-06)


Update 0.8 (BETA) (2021-03-10)


Update 0.9 (BETA) (2021-03-11)


Version 1.0
Release 1.0 (2021-03-14)


At this break, Kokonotsuba did not make any major improvements and therefor did not continue the numbering system. As of July 2021, this will be resumed. The system in place to monitor upgrades was also not in place, so the differences between early versions are fuzzy.

It was deemed that after all the improvments, fixes, and updates, that Kokonotsuba had likely advanced by 2 versions, so the next public version is set at 1.3

Version 1.3
Release 1.3 (2021-06-07)
  1. Added fileboard
  2. Removed XSS vulnerability
Update 1.3.1 (2021-07-13)
  1. Fixed issue with nav menu loading the top border when persistent navigation was not enabled.
  2. Fixed issue with nav menu overlap when not in persistent navigation mode.
Update 1.3.3 (2021-07-21)
  1. Globalized styles
  2. Fixed 3 bugs.
  3. Forbid title-less threads on textboards
  4. Made threadlist more useful
Update 1.3.4 (2021-07-21)
  1. Made the submission page look prettier