On Oct 16, 石井 峯夫 submitted the Change Report to Ministry of Finance. The report shows that 石井 峯夫 decreased their holdings in $ISHII HYOKI (6336.JP)$, with their joint shareholding ratio down from 26.97% to 23.34%.
Source: Edinet Announcement
What is the 5% shareholding reporting system?
Shareholders with holding ratio exceeding 5% must submit a Large Shareholding Report within five business days from that day. If the holding ratio increases or decreases by 1% or more after submitting a Large Shareholding Report, the holder must submit a Change Report within five business days from that day.