This book of maps seems to have been used as a texbook of high school because there was a handwriting of a name of a Japanese boy Kitahara who scribbled "Third year class B of Obama Middle School" (小浜中等学校) in a blank page. Middle Schools (旧制中等学校） in those days are equivalent to High Schools today. ..................
The year 1903 seems to be a very critical year because Korean Empire had just promulgated the Edict #41 three years ago and was two years before the incorporation of Takeshima (Liancourt Rocks).
Then, please look at the map of Korea in the book. It shows 欝陵島（松島） "Ulleungdo (Matsushima)" in the Sea of Japan but Liancourt Rocks were not included in the map. It is clear that Japan thought (and the world thought too) that Korea's easten limit was Ulleungdo, because many maps and books of geography clearly mentioned so.
So it is natural that Kimotsuki, a director of Hydrography Department of Navy, advised Nakai Yozaburo in 1904 that Liancourt Rocks didn't belong to Korea.
A Pro-Korean blog made by Steve Barber mentioned "........ the grounds for incorporation were clearly made known. Kimotsuki' s claim that Takeshima/Tokdo was owned by no one at all in 1904 was totally different from the past position taken by the Navy's Hydrographic Department, as stated already."
He wants to mislead and impress people that Japanese Navy had a malicious mind to invade Korea already in early 1900's and that Japanese Navy pretended Liancourt Rocks were ownerless islands although they were Korean islands, but his comments above are untrue.