A few weeks before Shimosha’s Onbashira, the unjiko (parishioners) perform an important undertaking called Kizukuri. This is where they make the final preparations to the pillar before Yamadashi. The work is managed by the Kizukuri-shu. They cut the logs so that the harnesses and ropes can be attached and otherwise get the hashira roadworthy. Following that, the Motozuna-shu attaches the harnesses in a job known as wana-guri.
Image above and other 2016 photos courtesy of Akiko Tamura
The following wanagiri shots are from just before Satobiki 2010. Included here to show the harness making process.