Interesting to see discussions going on about tailors in Korea. Yes Korean men are indeed victims of rapid modernization and economic growth. They are not given a chance to savor and appreciate the true beauty or style of gentlemen's suit. Almost 99% of Korean male in suit are fashion-terrorists - wearing huge suit (on average 2 size larger than their body size) or excessively shining skinny suit (we deride them as "cutlass fish"). The long trousers (thus making heavy breaks around ankles) and cheap black square-toed shoes have become an easy identification tag for Koreans when you see them overseas.
Yet as a member of Style Forum and an active participant at Korea's own version of style forum, I would like to let you know there are two excellent stores.
1. Segi tailor: It means "century tailor" ("Segi" is pronounced "Seh-ghee." The first syllable se as in "set" the second ghee as in "lamborghini") Famous for tailoring the three former Korean presidents, their style is excellent - true to Neapolitan style. Visit "www.segitailor.com
" and check their style yourselves. The price starts with 1200K won (about US$900) and for a Neapolitan style, you should pay at least 2000k won (about US$1500). It's a bespoke tailorshop, taking more than three weeks. Located at the B1 floor of Lotte Hotel near City Hall.
Please note most tailorshops around Sogong-dong (nearby City hall and Bank of Korea building) are the best in Korea, which means the most expensive. Frequent customers include politicians, CEO's of big companies, high-ranking diplomats, etc. Among them Segi is rated one of the best.
2. Lansmere: Located in Cheongdam dong (upscale town in Kangnam area), this is a collection shop of luxury goods. It also provides a wonderful custom tailoring. Starting price is around 3000K won (about US$2300). They also sell John Lobb shoes, Tie your tie ties, Attolini suits, etc.
As for shirts, Hamilton is not regarded as good among the members of that Korean version of style forum. Instead they recommend "Lims" at Hyatt (on the foothills of Namsan Mountain) and "Savile Row" nearby Sejong Art Center. (this place is quite hard to find for foreigners). Price starts with around 50k won (35 dollars). "Goshe" is also a good one located in Apgujeong dong. (As far as I know, Goshe and Savile Row are from the same managers). I am not sure whether or they can speak and understand English at those shops, yet their quality is good.
You can buy some upscale shoes like Stefano Bemer, John Lobb in Seoul as well only you know where they are sold. Believe or not, you can buy Church's shoes at dirt cheap price in Seoul, only if you know how to shrewdly use "the shoe voucher" at the department store (while supplies last). Some of my friend bought a pair of Church's Consul at 400k won. (around US $300).
The more you know about Seoul, the more surprised you will be. I'm Korean living in Seoul for more than 25 years. Ask me anything about Seoul.