After the sudden closure of wakachan.org, I have volunteered to continue hosting the /azu/ board.
This board is running on vichan
https://github.com/vichan-devel/vichan/, a fork of Tinyboard, itself a popular PHP-based replacement to aging imageboard software such as Wakaba. Tinyboard+vichan offers a host of usability features that Wakaba does not. Because no code is shared between these projects, it is not possible to import the old posts. However, I believe the advantages offered by vichan are an acceptable trade-off.
I am in contact with the former administration of wakachan.org to retrieve a backup of /azu/ from before its closure. Pending transfer of the old site data, I will attempt to create a read-only mirror archive of the old site and reinstate the random header images.
As a reminder, this is a work-safe board.This post will be updated with further information as requested.