Before anything else, please bear in mind the following:
★This is to share my experience in applying tourist visa for Japan. This serves only as a guide. If you want to know the actual requirements, please visit this website http://www.kr.emb-japan.go.jp/visa/visa_tannki.html or just ring the Japanese Embassy in Seoul at 02-739-7400 so they can send the list to your email. After all, it’s always best to check from the original source.
★If you are visiting or staying at a relatives’ place in Japan, this doesn’t apply to you. Just call the Japanese Embassy for the requirements.
★I declared myself as a housewife. That’s why I provided the bank docs, and employment certificate of my spouse.
★ Documents should be submitted within 3months from date of issue.
★ Documents submitted at the time of application are not to be returned to the applicants, with the exception of passports.
★The Embassy of Japan will not make copies, if you need original documents, please bring the original and one copy.
★Basically, applicants should come in person to apply for visa. But, In some cases the application may be made by an accredited travel agent that has been approved by the Japanese Embassy / Consulate General or a proxy who will bring a letter of attorney and copy of ID membership to prove that someone belongs to the same organization.
★If your visa application were cancelled or refused, that sign would be stamped on your passport by consulate.
★After reviewing quirements by a Japanese consul, some extra documents may be required so as to go on a visa examination.
★Turn around time for visa process needs about 5~10 work days or more (except for weekend).
Here are the requirements I have submitted:
1. Visa application form signed by me with one recent photo.
(One photo which taken within 6 month and pasted on the application form.)
http://www.kr.emb-japan.go.jp/people/ryouzibu/visaform_en.pdf(english)
2. Original passport
3. Spouse’s letter of employment verification that was issued recently by employer (Using the organization letterhead, it doesn’t mean a contract letter)
4. A photocopy of both sides of my alien registration card. Must be valid until I return to Korea.
5. Spouse’s documents to prove the financial situations through the bank account in Korea.
*I submitted the list of deposit and withdraw up to 6months recently provided by my spouse’s bank.
*It’s not the one that you print out from internet.
*Actually, he got those papers printed out from the ATM. He was assisted by the attendant inside the bank.
*There is no required amount stated but to give you an idea our current balance when those papers were printed was ₩xx,xxx,xxx.😜
6. Confirmation copy of our roundtrip plane ticket and 3days 2 nights hotel accommodation from Hana Tour.
*Hotel confirmation must show the guest name, date of check in/out by hotel.
*We highlighted our names, flight, and hotel details for easy reading using a highlighter.
8. Schedule of stay. You must follow the format which is provided on the Japanese Embassy website. I will provide the itinerary I submitted after our trip is done.😜
9. Marriage Certificate (혼인관계증명서)
10. Family Registration (가족관계증명서)
⊙Japanese Embassy in Korea⊙
The Japanese Embassy here in Korea is located near Angguk Station Exit 6. The exact address is 8th Floor, Twin Tree Tower A, 6, Yulgok-ro, Jongno-gu, Seoul. (서울특별시 종로구 율곡로 6 트윈트리타워 A동 8층). They are open weekdays from 9:30 to11:30 AM & from 1:30 to 5:00PM.

Just follow the map. You'll never get lost.
I went there by myself on Oct 19 (Monday). I was instructed to call them up the next day to know if my passport was ready for pick up or if additional documents were still needed.
I woke up almost 11AM the next day (Tuesday) and told my husband to ring them up. I got my passport the following day (Wednesday) at around 11AM. I didn’t pay for anything to get this visa.
Like usual visas. The single entry is valid for 3 months since the issue date. I could stay in Japan for 15 days. The counting starts upon landing to that country.

My 1st Japan Visa.