The following page was found in a scrapbook from the Dutch East Indies. The page seems to have been cut out from the wartime magazine “飛行少年”. The fighter depicted is a mystery to me and everyone I consulted. And although not directly warship related, it might pique your interest.
For convenience, here is a rough translation.
I surmise the designation EK comes from the designer’s initials (Eijiro Sekigawa) and his location (Kobe). Sadly, I do not have any more info pertaining to nor the expertise to analyse this.
Source:
NIOD Instituut voor Oorlogs-, Holocaust- en Genocidestudies
400 Indische Collectie - 15.02.1.02 inventory number 1244A Plakboek 1
https://proxy.archieven.nl/298/696B99CF5443DABBE0538A77ABC2F69C
Pg. 49 / 153
Update:
I've been made aware of a similar thread on Secretprojects forum. Here blackkite provided additional context.
"Hiko Shonen（飛行少年）was a wartime children's magazine. This was a book from a group called the Great Japan Flight Association（大日本飛行協会）, and it seems to be mainly written content that raises young people to be airmen."
