Template
When expanding the tables:
Colours:
- green (#9f9) is not asking at all
- blue (#9ff) is free form field
- yellow (#ffb) is "asks, but optional" or has option for "None", "prefer not to state", etc.
- purple (#f9d) is for mandatory selection which attempts to include other possibilities (such as "other")
- red (#f99) is mandatory selection, allowing only female or male
- white background is some other situation (describe)
Fields:
- gender is for explicit gender (or "sex") selection
Finance
Banks
| Company | Gender | Notes | 
| Aozora Bank | Mandatory: Male, Female |  | 
| Banco do Brasil (in Japan branch) | Mandatory: Male, Female |  | 
| Bank of China Tokyo branch | Mandatory: Male, Female |  | 
| GMO Aozora Net Bank | Mandatory: Male, Female, Prefer not to say |  | 
| Habitto | Mandatory: Male, Female, Prefer not to say |  | 
| Japan Post Bank (Yūcho Ginkō) | Optional: Male, Female |  | 
| KEB Hana Bank Japan | Mandatory: Male, Female |  | 
| Lawson Bank | Mandatory: Male, Female |  | 
| Minna Bank (Minna no Ginkō) | Mandatory: Male, Female, No answer[1] |  | 
| Mizuho Bank | Mandatory: Male, Female |  | 
| MUFG Bank (Mitsubishi UFJ Ginkō) | Mandatory: Male, Female |  | 
| Orix Bank | Mandatory: Male, Female |  | 
| PayPay Bank | Mandatory: Male, Female |  | 
| Rakuten Bank | Mandatory: Male, Female |  | 
| SBI Shinsei Bank | Mandatory: Male, Female |  | 
| SBI Sumishin Net Bank | Mandatory: Male, Female |  | 
| SBJ Bank | Mandatory: Male, Female |  | 
| Seven Bank | Mandatory: Male, Female |  | 
| SMBC Trust Bank (Prestia) | Mandatory: Male, Female |  | 
| Sony Bank | Mandatory: Male, Female |  | 
| Sumitomo Mitsui Banking Corporation | Mandatory: Male, Female |  | 
| Tokyo Star Bank | Mandatory: Male, Female |  | 
| UI Bank | Mandatory: Male, Female |  | 
Non-bank financial
| Company | Gender | Notes | 
| AirWallet | Optional: Male, Female, Prefer not to say[2] |  | 
| ANA JCB Prepaid Card | Mandatory: Male, Female |  | 
| ANA Pay | Mandatory: Male, Female |  | 
| B/43 | Mandatory: Male, Female, No answer[1] |  | 
| Bank Pay[3] | Optional: Male, Female |  | 
| Bankit | Mandatory: Male, Female |  | 
| Curfex Japan | Mandatory: Male, Female |  | 
| d-Barai | Mandatory: Male, Female |  | 
| Evering | Mandatory: Female, Male, Other |  | 
| FamiPay | Mandatory: Male, Female, Other |  | 
| Idare | Mandatory: Male, Female |  | 
| J-Coin Pay | Mandatory: Male, Female |  | 
| Kyash | Doesn't ask |  | 
| LINE Pay | Doesn't ask |  | 
| Mixi M | Doesn't ask |  | 
| Mobile Pasmo | Mandatory: Male, Female |  | 
| Mobile Suica | Mandatory: Male, Female |  | 
| PayPay | Mandatory: Female, Male, Other |  | 
| Sell & Pay | Optional: Male, Female, Other |  | 
| Suica (Google Pay) | Mandatory: Male, Female, Prefer not to say[2] |  | 
| Toyota Wallet | Optional: Male, Female, Other |  | 
| V-Preca | Mandatory: Female, Male |  | 
| Vandle Card | Mandatory: Male, Female, No answer[1] |  | 
| Visa Puripe | Mandatory: Male, Female |  | 
| Wester (Mobile ICOCA) | Optional: Male, Female |  | 
Credit Card
| Company | Gender | Notes | 
| Epos Card | Mandatory: Male, Female |  | 
| Pool | Mandatory: Male, Female, No answer[1] |  | 
| Saison Card | Mandatory: Male, Female |  | 
Investment
| Company | Gender | Notes | 
| Ando Securities | Mandatory: Male, Female |  | 
| au Kabucom Securities | Mandatory: Male, Female |  | 
| Fidelity Securities | Mandatory: Male, Female |  | 
| IwaiCosmo Securities | Mandatory: Male, Female |  | 
| Matsui Securities | Mandatory: Male, Female |  | 
| Monex Securities | Mandatory: Male, Female |  | 
| Moomoo Securities Japan | Mandatory: Male, Female |  | 
| Rakuten Securities | Mandatory: Male, Female |  | 
| SBI Securities | Mandatory: Male, Female |  | 
| Webull Securities | Mandatory: Female, Male |  | 
Cryptocurrency
| Company | Gender | Notes | 
| Binance Japan | Mandatory: Unspecified, Male, Female |  | 
| Bitbank | Doesn't ask |  | 
| bitFlyer JP | Mandatory: Male, Female, I prefer not to say[1] |  | 
| BitPoint | Mandatory: Male, Female |  | 
| Coincheck | Mandatory: Male, Female |  | 
| Huobi Japan | Mandatory: Male, Female |  | 
| LINE Bitmax | Mandatory: Male, Female |  | 
Accounting Software
| Company | Gender | Notes | 
| Money Forward ME | Mandatory: Male, Female |  | 
| Zaim | Optional: Male, Female, Other |  | 
Foods
| Company | Gender | Notes | 
| Burger King JP | Optional: Male, Female, Unanswered |  | 
| Club Tully's | Mandatory: Male, Female |  | 
| Domino's Pizza Japan | Doesn't ask |  | 
| Freshness Burger | Optional: Male, Female, Other |  | 
| KFC Colonel Club | Optional: Male, Female |  | 
| McDonald's JP | Optional: Male, Female |  | 
| Mos Burger | Mandatory: Male, Female |  | 
| Starbucks Coffee Japan | Mandatory: Male, Female, Other |  | 
Online shopping
| Company | Gender | Notes | 
| Amazon.co.jp | Doesn't ask |  | 
| Geestore.com | Doesn't ask |  | 
| Kaldi Coffee Farm Online Store | Mandatory: Female, Male, Do not select |  | 
| Mercari Japan | Mandatory: Male, Female, No answer |  | 
| Muji Online Store | Mandatory: Male, Female, Do not select |  | 
| Qoo10 | Mandatory: Male, Female |  | 
| Rakuten | Mandatory: Male, Female |  | 
Bookstore
| Company | Gender | Notes | 
| Animate International | Doesn't ask |  | 
| Animate Japan | Mandatory: Male, Female, Other, Prefer not to say[2] |  | 
| Comic Zin | Optional: Male, Female |  | 
| e-hon | Optional: Male, Female |  | 
| Gamers | Mandatory: Male, Female, Other, Prefer not to say[2] |  | 
| Honto | Mandatory: Male, Female, Other, Prefer not to say[2] |  | 
| Honya Club.com | Mandatory: Male, Female |  | 
| Kinokuniya Japan | Mandatory: Male, Female |  | 
| Mangaoh | Mandatory: Male, Female |  | 
| Mangazenkan.com | Mandatory: Male, Female |  | 
| Melonbooks | Mandatory: Male, Female, Other, No answer[1] |  | 
| Suruga-ya | Doesn't ask |  | 
| Toranoana | Mandatory: Male, Female |  | 
Clothes shop
| Company | Gender | Notes | 
| Cecile | Optional: Female, Male |  | 
| Nissen | Optional: Woman, Male |  | 
| Uniqlo Online Store JP | Mandatory: Female, Male, Other |  | 
| Zozotown | Mandatory: Male, Female, Other |  | 
Computers and Electronics
| Company | Gender | Notes | 
| BicCamera.com | Mandatory: Male, Female, No answer[1] |  | 
| Dospara | Mandatory: Male, Female |  | 
| e-Trend | Optional: Male, Female |  | 
| esupply | Mandatory: Male, Female, No answer |  | 
| Kojimanet | Mandatory: Male, Female, Unanswered |  | 
| Nojima Online | Mandatory: Male, Female |  | 
| PC Koubou | Mandatory: Male, Female |  | 
| PC Shop Ark | Optional: Male, Female |  | 
| Sofmap.com | Mandatory: Male, Female |  | 
| Tsukumo | Doesn't ask |  | 
| XPrice | Doesn't ask |  | 
| Yodobashi.com | Mandatory: Male, Female |  | 
Ebooks
| Company | Gender | Notes | 
| Comic Fuz | Optional: Male, Female, Other, Prefer not to say[2] |  | 
| Magazine Pocket (Magapoke) | Optional: Male, Female, Other |  | 
| Manga One | Optional: Male, Female, Other |  | 
| Piccoma | Mandatory: Male, Female, No answer[1] |  | 
| Sunday Webry | Optional: Male, Female |  | 
Reward website
| Company | Gender | Notes | 
| A8.net | Optional: Male, Female |  | 
| Hapitas | Mandatory: Male, Female |  | 
| Moppy | Mandatory: Male, Female |  | 
| Nifty Point Club (Lifemedia) | Mandatory: Male, Female, Other |  | 
| Yentamenet | Mandatory: Male, Female |  | 
Transport
| Company | Gender | Notes | 
| Bus Sagasu | Mandatory: Male, Female |  | 
| Busbookmark.jp | Mandatory: Male, Female |  | 
| Eki-net | Mandatory: Male, Female, Other/No answer |  | 
| Japan Expressway Bus Net (Kousokubusnet) | Mandatory: Male, Female |  | 
| Kintetsu Internet Reservation Service | Mandatory: Male, Female |  | 
| Kosokubus.com | Mandatory: Male, Female |  | 
| Meitetsu | Optional: Male, Female |  | 
| Mobile Pasmo (include Google Pay Pasmo) | Mandatory: Male, Female |  | 
| Mobile Suica | Mandatory: Male, Female |  | 
| Suica (Google Pay) | Mandatory: Male, Female, Prefer not to say[2] |  | 
| Travel Marche | Mandatory: Male, Female |  | 
| Wester (Mobile ICOCA) | Optional: Male, Female |  | 
| Willer | Mandatory: Male, Female |  | 
Utilities
Mobile phone operator
| Company | Gender | Notes | 
| Aeon Mobile | Mandatory: Male, Female |  | 
| Ahamo | Mandatory: Female, Male |  | 
| au | Mandatory: Female, Male |  | 
| B-mobile | Mandatory: Male, Female |  | 
| Biglobe Mobile | Mandatory: Female, Male |  | 
| HIS Mobile | Mandatory: Female, Male |  | 
| IIJmio | Mandatory: Female, Male |  | 
| LinksMate | Mandatory: Female, Male |  | 
| Mineo | Mandatory: Female, Male |  | 
| NTT Docomo | Mandatory: Female, Male |  | 
| OCN Mobile One | Mandatory: Female, Male |  | 
| Povo | Doesn't ask |  | 
| Rakuten Mobile | Mandatory: Female, Male |  | 
| Rocket Mobile | Mandatory: Male, Female, Other |  | 
| SoftBank | Mandatory: Female, Male |  | 
| UQ Mobile | Mandatory: Female, Male |  | 
| y.u Mobile | Mandatory: Female, Male |  | 
| Ymobile | Mandatory: Female, Male |  | 
Other
| Company | Gender | Notes | 
| Eraberu e-Gift | Mandatory: Male, Female, Other, Unanswered |  | 
| FanTop | Doesn't ask |  | 
| Giftee | Mandatory: Male, Female, Other |  | 
| HH cross | Mandatory: Male, Female, Other, Prefer not to say |  | 
| Hulu JP | Mandatory: Men, Women, Prefer not to answer |  | 
| Mora | Mandatory: Male, Female, Prefer not to say |  | 
| Sagawa Express | Mandatory: Male, Female, Other, Prefer not to say[2] |  | 
| Shufoo | Optional: Female, Male | Cannot be changed later. | 
| Tomod's | Optional: Male, Female, Do not specify[4] |  | 
| Yahoo Japan | Mandatory: Male, Female, Other, Prefer not to say |  | 
References
See also