MarsSeed [1] filed a deletion request for sakura-bzr [2]: Obsolete Bazaar-based VCS package abandoned in 2015. Not needed anymore; project source code has been migrated to Git on Launchpad.
Arch carries the latest stable version (updated 2021-10-27 ): https://archlinux.org/packages/community/x86_64/sakura/ [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/sakura-bzr/
