On Aug 30, 水嶋 浩雅 submitted the Change Report to Ministry of Finance. The report shows that 水嶋 浩雅 increased their holdings in $Simplex Financial Holdings (7176.JP)$, with their joint shareholding ratio up from 24.47% to 27.96%.
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.