(I will be posting more from this special illustration book in the future. This is the end of the interview with Aoyama however.)
*1 : In a previous manga Aoyama drew called "Yaiba" there is a character named Souji Okita. In real life Okita Souji was the captain of the special police force in the Edo period known as the Shinsengumi. The Shinsengumi was created by the Tokugawa Shogunate at a time when there was a threat that the government was going to be overthrown and the political system would change (the Meiji Restoration). The Shinsengumi were a group of skilled swordsman who where charged with cutting down radical "reformists", or in other words, people they saw as a threat to the Shogunate. They mainly operated in Kyoto.
Souji Okita: https://en.wikipedia.org/wiki/Okita_S%C5%8Dji
Souji Okita first appeared in Detective Conan, being mentioned in Vol. 31 File 8, "The Swordsman of Naniwa," Naniwa being an old name for the Osaka region. (Episode 263 of the anime). He also made his first physical appeared recently in Files 990 to 993 (Weekly Shonen Sunday 2017, Vol. 17, 18, 20 and 21).
*2 : Vol. 28. Anime episode 222 to 224.
*3: Vol. 83. Anime episode 763 to 764.
*4: In the original Japanese version his assistant is speaking in an Osaka accent like Heiji.