The following 1790 Japanese map shows Ulleungdo (竹シマ = 竹島 - Takeshima) and Liancourt Rocks (松シマ = 松島) as Japanese territory, based on the color of the islands. The full map can be seen HERE, and its cover can be seen HERE.
Japan had given up her claim to Ulleungdo in th 1690s, so I do not know why the map is showing Ulleungdo (竹島) as Japanese territory, but what is significant about the map is that it clearly shows Liancourt Rocks (松島) as Japanese territory.
I do not know what he is saying, but Tanaka Kunitaka talks a little bit about the map HERE.
The following Japanese map is called the 亜細亜小東洋圖, and appeared in an 1835 atlas called 唐土歴代州郡沿革地図. The original atlas and map were made in 1789, and are stored in Japan's National Diet Library. The map shows Ulleungdo (竹シマ = 竹島 - Takeshima) and Liancourt Rocks (松シマ = 松島 - Matsushima) in red, which designated them as Japanese territory.
The following 1861 Japanese map is called 新刊輿地全図. It shows an island that was most probably Ulleungdo labeled as タケ(Take), which was almost certainly an abreviation of Takeshima (竹島). The island is colored in red, which designates it as Japanese territory.
Japan gave up her claim to Ulleungdo in the 1690s, but by the late 1700s and early 1800s, it appears some Japanese maps were once again showing Ulleungdo (Takeshima) as Japanese territory. I wonder why?