Interview in Conan Drill from 2003 translated! No spoiler on the plot here, though there are a lot of interesting tidbits.
Note: I took a lot of liberty with the English this time, since I wanted to focus more on making the English sound natural and readable. I usually try to translate as directly as possible, but I realize that the weird English probably turns off a lot of people – let me know if I've taken too much liberty, though.
Also, Gosho says a lot of things here that he mentions in future interviews, like how he was told to change Conan's name to Doyle since there was a work called Future Boy Conan, directed by Hayao Miyazaki. You kinda realize that interviewers keep asking the same questions, maybe because they don't bother looking over past interviews, ha ha.
Highlights:
The plot for conan was planned in two weeks
Gosho is not "high-strung / neurotic" - he seems pretty laid back
Apparently, in File 125~, the dude pays the gal to be his lover
Gosho has an editor who is from Kansai, and looks at DC's Kansai-ben – this makes sense, I've read people on 2chan talk about how young Kansai people these days don't say "ame-chan" (Files 778-780), but since Gosho gets coached on Kansai-ben by an older guy, the Kansai-ben in DC is rather dated.
Gosho has two younger brothers, one who's an engineer and another who's a doctor. The engineer helps Gosho with tricks related to cars, and the doctor helps Gosho with medicine-related topics, like APTX. The doctor is also an anime otaku who advices Gosho about which voice actor should voice whom.
Gosho also seems to have connections who are former police detectives, people working at banks, CSIs, etc.
Gosho decided when he started that Conan won't cry
Gosho only draws characters with names, leave backgrounds and characters without names to assistants - does that mean that the forensics dude who wasn't Tomo-san in File 756-758 will become important someday?! Lol I dunno.
Maybe you guys knew this already, but apparently Paikaru/Baiganer isn't a real brand of alcohol – the name comes from a character in Lupin III.