On Aug 20, 井上 英一郎 submitted the Change Report to Ministry of Finance. The report shows that 井上 英一郎 increased their holdings in $Takamatsu Machinery (6155.JP)$, with their joint shareholding ratio up from 9.37% to 10.39%.
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.