Today is the Invention day (which I forget every year), and I was able to place an advertisement in a local newspaper this year as well.
I am very grateful to be placed next to the long-established Matsuda Patent Firm and Miyata Patent Firm.

Quote from JPO website
On April 18, 1885 (year 18 of the Meiji Era), Korekiyo Takahashi, the first Commissioner of the Japan Patent Office, promulgated Patent Monopoly Act (the predecessor of the current Patent Law) and the patent system in Japan started.
Commemorating this, on January 28, 1954 (year 29 of the Showa Era), the Ministry of International Trade and Industry (the Ministry of Economy, Trade and Industry) stipulated April 18 as Invention Day to raise public awareness of industrial property rights system including patent system.