The fact that Murase was responsible for the "Axis Shock" or the "First Gundam/CCA" flashback scene in Unicorn 7 was credited multiple time by different person, such as Ogata in the Hathaway's event "Heirs to Gundam" or the Gundam Unicorn official twitter account ( https://twitter.com/gundam_unicorn/status/772189892478504960 )
Considering how this looks like him, they should be refering to this + post 5708.