For the website, see
I’m glad for the response from abroad. Thank you very much. I was surprised at first, given that I didn’t even think to see if access to it could come from overseas. To result in being kindly sent drawings, and able to receive thoughts and impressions… (When receiving something in a language I can’t read, I make good use of translation sites.) Things like this make me very, very happy.

–Deep-Sea Prisoner, in an interview.

Deep-Sea Prisoner

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Character Information
Japanese Name 海底囚人
Romaji Name Kaitei Shujin
Location Kanagawa Prefecture
Status Active
Biological Information
Species Human
Gender Female
Professional Status
Affiliation Funamusea
Occupation Artist
Video Game Developer
Personal Status

Deep-Sea Prisoner (海底囚人, Katei Shuujin), commonly shortened to DSP, is a Japanese indie artist and game developer formerly known as Mogeko. She is well-known for creating games such as The Gray Garden and Wadanohara and the Great Blue Sea. She's a talented person working to create various games, comics, and other stories through various forms of media. 

Deep-Sea Prisoner has an official website, a Twitter, an Instagram, and a YouTube account. She can also be found on a multitude of other websites these days, with various new projects she is working on: Linktree . She used to have a Tumblr blog, but has since deleted it due to certain circumstances.

Deep-Sea Prisoner has stated that she no longer wishes to be called "Mogeko," as the name has developed a negative connotation and is associated with her fictional characters, "Mogeko," who are depicted as rapists.

Furthermore, even though her official alias is Deep-Sea Prisoner, she has stated that she likes being called "Funa," but thinks "Funamu" is even cuter. [1]

The Creative Process and Environment

Deep-Sea Prisoner draws with a tablet pen. Most of the situations in her works - when they happen, and what feelings they’re meant to invoke - and materials are planned in a single notebook or memos, that are used while working. The order is:

  1. Decide on a rough timeline of events
  2. Memos and materials
  3. Start creating when almost finished (little details are made up while making it)

Upon creating a story, she particularly focusses on the relationship between characters - who hates who and who likes who.[2]

Deep-Sea Prisoner has also said that, with the exceptions of humans and some other groups, everyone in their creations is bisexual (unless stated otherwise) and that ideas such as gender and age are left as an afterthought in the creative process. [3]  She has also said that several of her characters are "without gender, or somewhere in the middle, so it’s pointless to even think about it." [3]


Deep-Sea Prisoner's creations, especially Wadanohara and the Great Blue Sea, have received fairly positive reception overseas. Deep-Sea Prisoner says she's glad for the response from abroad and that she was surprised at first, but things like being kindly sent drawings and being able to receive thoughts and impressions make her very happy. [2]


The best way to contact her is through email or her Twitter. She is very approachable and friendly to her fans. Deep-Sea Prisoner knows a minimal amount of English, so do not be afraid to attempt and approach her with simple English. Additionally, Deep Sea Prisoner says that when she receives something in a language that she doesn't understand, she makes good use of translation sites. [2]

Ways to Support 

Deep-Sea Prisoner has a variety of ways in which fans can support her, one main way being that of Ci-en - where people can get access to exclusive content and behind-the-scenes of certain projects she is working on before they are released. Another method is through Booth, where she sells her merchandise, alongside Alice BooksAmazon, and Suzuri. Deep-Sea Prisoner has also started dabbling in the world of Live2D, and she has begun selling her creations on Nizima.


Further details about ordering a Live2D model from DSP can be found on her blog in the custom order guidelines.

Below is a list of current Vtubers that have bought from her designs:


In the summer of 2014, Deep-Sea Prisoner was harassed by Tumblr users in regards to a fan-requested drawing posted on her Tumblr depicting one of her characters, Syakesan, sexually assaulting another character, Wadanohara. Deep-Sea Prisoner deleted her Tumblr blog in response to the reaction. This would lead to her adopting new policies in regards to the sharing of her content. [4] She (temporarily) restricted the usage of her games to be for private usage, with live streams and playthroughs of her games being forbidden. This ban has since been lifted.

Some issues also rose among Korean fans of Deep-Sea Prisoner, regarding Deep-Sea Prisoner's usage of the rising sun flag on her website. In some Asiatic countries (particularly Korea and China) the symbol is viewed as a negative symbol of Japanese imperialism. Deep-Sea Prisoner has since apologized for her usage of the symbol, stating that she was unaware of the offensive connotation of the symbol; in Japan, the rising sun represents great fortune and is a common sight during New Year's time as a sign of good luck. Despite her apology, however, she continues to feature the symbol in her media. For unknown reasons, possibly related to this, Deep-Sea Prisoner has blocked Korean IP addresses. [5]


The following are some guidelines in regards to usage of Deep-Sea Prisoner's creative media. These guidelines have been outlined by Deep-Sea Prisoner herself. [6]

  1. Do not reprint nor translate her works without written permission. If you want to translate for her, you have to ask her directly.
  2. Do not provide direct links to pictures on her website. Links to pages are fine.
  3. Using her art for things like headers, profile pictures, sidebars, backgrounds, etc. is no problem at all.
  4. Don’t make transparent background images of her art and upload it. One or two is okay, mass-reposting is not.
  5. She'd prefer if you didn’t screenshot and post her emails because it makes her embarrassed.
  6. For translated versions, while she prefers it to be on one platform only, as long as it’s posted by the translator themselves, it's alright.
  7. For translated versions of spoiler-y or rated artworks, she'd like for it to be under a Read More, with ample warnings.
  8. If you have any special reason to want to reprint her works, ask her directly via email. She can answer in basic English if you keep it simple.
  9. For merchandise, as long as you’re not doing it for profit or commercially, and are doing it as a fan, she doesn't have many issues whatsoever. (But contact her just in case anyway)
  10. If you claim her art as yours, she will punch you. [6]
  11. Fan-games are allowed, as long as it's made clear that it's a fangame and as long as none of her art or resources are used (AKA, don't rip files and use them in your game! But a fangame using your own fanart is fine.)


  • When asked about her favorite animal on Twitter, DSP responded by saying that her favorite animal is a dog. [7] She also likes killer whales a lot, along with chinchillas and chickens. [8]
  • One of Deep-Sea Prisoner's favorite books is Paradise Lost by John Milton. [9]
    • This is also the book that Reficul and Elux's world/story is supposedly based on.
  • When asked about her favorite music, DSP said she loves the music by the Japanese alternative rock group Bump of Chicken[10]
  • DSP has also mentioned that she likes Vocaloid. [11]
  • In her first-ever live stream, DSP mentioned she would often draw for 12 hours a day soon after she graduated high school. [8]
  • DSP has also stated on her live stream the various foods that she enjoys, which include sushi, ramen, miso, tonkotsu, and taiyaki with red bean paste. She also enjoys persimmon seeds [8] and takoyaki. [11]
  • Her favorite drink is coffee. She also likes bubble tea. [8]
  • On the topic of food, she stated she likes cooking. [8]
  • Her favorite Sanrio character is Pompompurin. [8]
  • Her favorite color appears to be red, with purple coming in second. [8]
  • Some favorite games that are perfect "time thieves" for her include 7 Days to Die and Stardew Valley[8]
  • When asked what her favorite anime was, DSP said she enjoys Evangelion and PriPara[8]
  • Vietnam and Bali are two places she has visited. As for places she would like to visit, she said she would like to go to Thailand and Taiwan. [8]
  • DSP has recently gotten into VTubers, particularly one by the name of Yamikumo Kerin[12], whom she has also drawn fanart of. [13]
  • Her favorite flowers include roses, snapdragons, carnations, gerberas, and pansies; she finds flowers beautiful. [12]
  • DSP did a voice reveal during her third Minecraft gaming livestream. [14]
  • When it comes to her mascot character, Torisan, DSP specified during her third Minecraft live stream that he is simply another character, rather than a proxy for the artist herself. Because of this, when using her real voice, she is represented by a small pixel ghost and describes herself as a “mysterious evil spirit” who sometimes possesses Torisan. [14]



Deep-Sea Prisoner
General Deep-Sea Prisoner ·
Deep-Sea Prisoner's Works
Games Carnival Rhythm* ·A Paradise Submerged In Darkness* · Devil Girl Ivlin* · Garden Gray The · General Hashasky's Great Adventure* · Ice Scream · Mogeko Castle · The End of the Wonderland* · The Gray Garden · Wadanohara and the Great Blue Sea (Reboot)
Manga Obsolete Dream · Seaside Dispatches 1 · Seaside Dispatches 2 · Wadanohara and the Great Blue Sea
Flash Poison Bugs · The Sun's Curse
Multimedia Ice Scream
* = has yet to be released

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