Yuichi Usagi - what's in a name?
I read "Senso" over the end of March and the last week and reviewed a bunch of interviews again and man i dunno how to post abt it but it seems that Yuichi Usagi is actually intentional as naming? And yes, Yuichi can be a last name also, but is still mainly read as a first name.
Like specifically it seems that it’s a reference to the ending of “Usagi Yojimbo: Senso” in a similar way to how the rest of the show is also intentionally an homage to that story as it’s main source of inspiration.
“Yuichi” commonly has the meaning "heroic first (son)" (雄一) and in the japanese subtitles, Yuichi is spelled as both 雄一 and ユウイチ - Yūichi. So let's take the japanese subtitling as additional canon as that’s how the character’s introduce themselves. (I'll link this Japanese-Names website as an online source for now since I'm not fluent in it myself.) The subtitles are based on the english dub of course, but it seems the japanese dub is similar on the name introductions for the most part (not a native speaker myself so I can only guess).
Spoilers for Senso if you haven't read it. I recommend you do, if really nothing else. It’s a really nice mashup of sci fi in Usagi Yojimbo, in a very “War of the Worlds” type clash. I really loved the foreword comic and the illustrations before the story. It's a really good story. Here’s a nice spoilerless review of it by Nothing but Comics.
(edit 9.11.2025): Interviews I am going to reference:
Stranger Worlds interview with Stan about Senso (Sept 7,2015)
The CBCC interview with Stan and art director Khang Le + the showrunners/writers Langdales (May 9, 2022)
Film Rejects interview with Stan and crew (May 14, 2022)
POPverse interview with Stan and Khang (May 31, 2022)
Other interviews I am going to vaguely ref are here: SR trivia
So from interviews we know that the Samurai Rabbit crew was inspired by and drew influences from six-issue book Usagi Yojimbo: Senso - you can see it in how the Makkine were designed and episode references (S2, ep 9 "Eggs!" - the falling martian ships are called eggs in “Senso”) and mainly the story outline of aliens invading edo-period japan.
So why give Yuichi Usagi a first name as a last name?
We see this backstory in "Willow Branch" in season 2.
The sword was lost. That is a storyline they included to make an interesting story out of it but to also connect the show and og comic in a different way. A "passing of the torch" in some sense, but also literally what the comic tells us about og Usagi and his swords. In Senso: "They are my soul. Pass them down to your firstborn… then to his [...] then down the line…” And in the show we see that Willow Branch is found and recovered by Yuichi and the sword accepts him as the next in line. The firstborn son.
So from this we can make the fan-theory that perhaps in the show canon, Miyamoto Usagi’s family maybe named their next firstborn in line Yuichi, to honor their forebear Miyamoto Usagi's last wish, again if we're going by the thought that this was inspired by "Senso". (Jotaro being his last surviving member in this verse possibly, we don't know here bc it's intentionally left vague to not spoil series-only viewers + keep the mystery open for anyone who decides to read the comic after the series for the first time). It could even be a possibility that they just kept that as a surname for sentimental reasons, because the family had women as first-born children for so long (if we assume based on Usagi's auntie and missing parents), but they wanted to keep that memory going for as long as possible, since the sword was lost shortly after Miyamoto saved Edo from Kagehito’s plan a 1000 years before Yuichi’s time. But that’s already just speculation from me as a fan of the cartoon.
And before die-hard comic readers swoop in, yes, in Senso the swords are not lost, but again, it’s an alternative universe story situation for the people making the show, and I find what they did was interesting.
The one-shot comic’s ending is tied into the world of “Space Usagi” as well, without spoiling it too much, which is a storyline Stan did in a space opera setting. The connection between being inspired by Senso which is tied to this story may also be why so many interviews and articles call Usagi Chronicles as inspired by Space Usagi directly, since both are spin-offs that take place in a distant future, even if the inspiration can only be seen in early concept art when the show had to pivot.
Or you know, it could also just be that they wanted an easy-sounding name for their main character to call that wasn't only Usagi, since they have two in the series: their own and the original.
But all in all, whether the name comes as a reference to the original comic, or from simple use of a common name, it can’t be ignored that this is just how the show calls it’s main character.
But you can still call him Yuichi, as that is what both the crew (his creators) and Stan Sakai call him when talking of both tbe Usagis. (Or, in the case of Stan, "my Usagi" and "Their/Samurai Rabbit/the show's Usagi") It could be that out of respect for the work the crew put into his series, Stan didn’t suggest more naming conventions for the character because he already liked the work and story the crew did. It could be that they put a pin in it at first and then got used to it as pre-production continued. Could even just be that he loled it right away. But I don’t find it that useful to speculate on that as much, because the cartoon we have is already made and finished how it is and well, we don’t know the exact authorial reasonings from the show crew side much, so Yuichi Usagi it is.
Though also, the way that his names are used in the show (Auntie mainly calls him Usagi and family usually adress via 1st name, Yuichi is never used mich beyond introductions) and how it's used in the interviews when talking about Miyamoto Usagi as well, it feels like they meant to give him two first names, and couldn’t decide on a surname-sounding last name so, Yuichi Usagi was left in the final script. But that's just my guess as a fan and viewer again.
Maybe other fans have had similar or better discussions about it? It would be interesting to know if the show has more japanese fans and how they find this, for example. What they think about how the show introduces him as Surname-Given Name, but then every other character switches to just calling him Usagi right away. In japan, people usually use last name+ honorifics when they have just met. But both Usagi's new friends and Usagi himself switch to first-name basis after their first day meeting each other and going through a few fights. Is it just because the show has a mostly western audience(my assumption), and we're meant to use his given name as an audience to be more familiar with him... or is it only because he's a rabbit and some of the characters (like Lord Kogane) don't really care more? Perhaps a 1000 years into the future, they've partially lost the use of some traditions?
In any case, it doesn’t feel like the show made that big of a faux pas naming Yuichi the way they did. Ould be that my guess is wrong and it wasn't as deliberate a reference to Senso. It seems a much higher possibility that they thought of that, thought it sounded nice and then kept it because it was an easy way to call him differently from comics-Usagi during production itself, but still getting to call him Usagi in the show-proper.
This is just me basing this on official interviews and the Senso book, but this just seems more likely than them picking a random name with no meaning to it. Of course, I could also be wrong, but based on interviews alone, the showrunners and creative team seem so genuine in wanting to give the comic a good show that it doesn't make sense that they wouldn't research it. Or at the very least, ask about it from Stan himself or even just get a note from him about it, since he reviewed everything else. Candie and Doug (showrunners) even mention (in Comic Book Couple's Counceling podcast interview) how they really wanted to go deeper with research this time and art director Khang Le mentioned how they took a lot of cues from modern japan as well, from their research trips there.
I know this probably won't put any future discussions/rambling about this to rest among other fans, but well, just some thoughts on this. While I think it's probably kind of silly of me to be writing long essays abt a cartoon show I like, I do think it sort of warrants more discussion abt how we talk about characters and how we refer to them. For another show i'm a fan of for example, the character has an official name and a nickname, but the show itself consistently only used the nickname to let the reader be familiar with her. While characters like teachers and enemies might refer to them with their given name, even her full name, their family and friends mainly use the easier nickname. But it seemed that the reverse happened with that show's fandom, as the more unique given name became more used than the nickname the show itself gave us. And this was sorta the same thoughtprocess I had here with Usagi Chronicles.
Anyway, this has been a post x3 I meant to make this shorter and just about Senso, but I sorta started rambling more after the auntie and generations of female Usagi descendants theory x3
edit 5.05: fixed some grammar and sentence logic mistakes! added clarifications where ref was missing (CCBC podcast)
edit 13.06: I looked up the spellings for Yuichi as a last name and while it's similar, based on how it's written in the show, this supports my previous reading still. It still seems like it's meant more as a title almost, the same way naming would have been in old norse for example "Ivan's son" would become "Ivanson" or in english-language names, "Miller's son" would become "Millerson" (patronymic). So again, maybe Yuichi is meant as "first son" as the first name, but Usagi is his namesake because the family still wanted to honor their common ancestor, Miyamoto Usagi. That's the possible in-world reasoning, but with how much this crew put into the show, I wouldn't be surprised that they thought the same thing, that it's a nice way to reference the book Senso they were insired by, but also Miyamoto Usagi the character, who they were inspired by.
