At Honda thanks day event couple days ago, I saw Tanabe, Asaki, Minatoya (Gasly's engineer), Nakano (chief mechanic), and many other Honda engineers (like 7 or 8 ) most of whose faces I can recognize by seeing them in those pictures from races, including the new trainee staffs mentioned in this article;
https://www.as-web.jp/f1/436719/2
(this article is about Honda expanding supply to 2 teams next year therefore need to double the number of race staffs so training new staffs in GPs using training passes from the team and guest passes of Honda)
So it was pretty much full cast allstars race staffs from Honda/Sakura side attending the event so I was really surprised. Asaki is in charge of organizing PU development at Sakura so only came to races in Canada and Japan to oversee the introductions of new specs, sure Motegi is very near from HRD Sakura but still quite surprising. Saw Yamamoto (motorsport chief) and Matsumoto (marketing chief) as well. Also lots of STR staffs (like 15 or maybe more) including Gasly's race engineer, max allowed race staffs for 1 team are 60 (incl both team/chassis side and engine side) so practically 1/2 of actual race team came all the way to Motegi, besides they brought in STR's race garage kit (2 silver prefabs) as well. Bit overkill for just a few laps of demo/show run, I thought it quite interesting and hazard a guess that maybe they were conducting concise simulation/training of race weekend operation/procedure for the new staffs plus some general preparations/trainings by taking advantage of this opportunity because 1.the article, 2.the presence of full race members from Honda incl trainees mentioned and practically full team for 1 car, 3.I could see that they were clearly timing for the car's outings, plus following normal protocols that you see in sessions, like standby and holding station by 4 mechanics holding tyre warmers -> wait for direction then give sign and all warmers removed at once. (Regarding Asaki Matsumoto Yamamoto etc perhaps it was to talk to all those press/media for both joint and individual sessions, certainly it's economical that way).