Had a pretty heated debate in the discord over this. Strangely, haven't seen this brought up before that I've found, and no one has seemed to notice, or care.
So, for background purposes, we're probably aware that the Japanese tend to use surname first when referring to someone, as a formality, unless you're a good friend or related in some way (marriage/family). This might imply that his first name is Sandayu... but, this is the kicker; if that is the case, he is probably the only one in the game that does this flip flop.
Take the Arasaka's; very few (or no one) says Arasaka Saburo, or Arasaka Hanako, or Arasaka Yorinobu... it's just Saburo, Hanako, or Yorinobu, sometimes -sama. What about Wakako? We hear her first name most often, and I believe only Takemura calls her Okada-san. Speaking of Goro, he's a unique case, because I naturally default to just calling him Takemura, it was used more often than Goro and I just got used to it. V calls him Goro occasionally, Johnny calls him Takemura (maybe both, I forget).
Now here's where it gets strange; Takemura refers to Oda by his (supposedly) first name, Oda refers to Takemura as Takemura-san (at least in the docks meeting). Oda has mentioned Yorinobu-sama, and Arasaka-sama (meant for Hanako). If his first name is Sandayu, why the flip flop? In fact, I don't believe anyone ever mentions Sandayu in the game outside of maybe some shards or whatever. Oda is practically Goro's only friend that we see, outside of V and maybe Saburo, and yet Goro does not respect formality between himself and Oda, and often others... why the difference?
What compounds this issue even more is that the 2077 wiki has pages on "Goro Takemura", "Hanako Arasaka", and then "Oda Sandayu", not "Sandayu Oda". If you google it, you will more often than not see people flipping his name and referring to him as Sandayu Oda - which I believe is the unusual response of not accepting the possibility that his first name could be Oda (because of Oda being a famous last name that even westerners know) and out of misled respect and formality, insist on reversing it because they know the Japanese do... but, even though Oda is well known, it's not necessarily only a surname, just like Sandayu can technically be a first or last name (supposedly).
It's confusing, but I assure you, it's not as simple as it looks. Japanese naming conventions are hard to follow, and strangely enough, sometimes they don't even follow their own rules in one way or another... but for simplicities sake, and logically, if the game is going to refer to the many Japanese characters in the game by their first name most of the time, would that not imply that his first name is Oda and not Sandayu? We can make the argument that V, and mostly everyone else in Night City, are not Japanese and therefore they are either being rude or incompetent, or maybe the formality of this aspect in Japan has waned leading up to 2077, or maybe the Japanese tend to be fine with the "disrespect" that everyone outside of Japan refers to them by western standards... who really knows...
Yes, it's quite possibly the most inane argument ever conceived, but it's frustratingly curious to me why Oda is the odd man out here, and why everything inside the game points to one thing, and everything outside of the game points to another.
So, for background purposes, we're probably aware that the Japanese tend to use surname first when referring to someone, as a formality, unless you're a good friend or related in some way (marriage/family). This might imply that his first name is Sandayu... but, this is the kicker; if that is the case, he is probably the only one in the game that does this flip flop.
Take the Arasaka's; very few (or no one) says Arasaka Saburo, or Arasaka Hanako, or Arasaka Yorinobu... it's just Saburo, Hanako, or Yorinobu, sometimes -sama. What about Wakako? We hear her first name most often, and I believe only Takemura calls her Okada-san. Speaking of Goro, he's a unique case, because I naturally default to just calling him Takemura, it was used more often than Goro and I just got used to it. V calls him Goro occasionally, Johnny calls him Takemura (maybe both, I forget).
Now here's where it gets strange; Takemura refers to Oda by his (supposedly) first name, Oda refers to Takemura as Takemura-san (at least in the docks meeting). Oda has mentioned Yorinobu-sama, and Arasaka-sama (meant for Hanako). If his first name is Sandayu, why the flip flop? In fact, I don't believe anyone ever mentions Sandayu in the game outside of maybe some shards or whatever. Oda is practically Goro's only friend that we see, outside of V and maybe Saburo, and yet Goro does not respect formality between himself and Oda, and often others... why the difference?
What compounds this issue even more is that the 2077 wiki has pages on "Goro Takemura", "Hanako Arasaka", and then "Oda Sandayu", not "Sandayu Oda". If you google it, you will more often than not see people flipping his name and referring to him as Sandayu Oda - which I believe is the unusual response of not accepting the possibility that his first name could be Oda (because of Oda being a famous last name that even westerners know) and out of misled respect and formality, insist on reversing it because they know the Japanese do... but, even though Oda is well known, it's not necessarily only a surname, just like Sandayu can technically be a first or last name (supposedly).
It's confusing, but I assure you, it's not as simple as it looks. Japanese naming conventions are hard to follow, and strangely enough, sometimes they don't even follow their own rules in one way or another... but for simplicities sake, and logically, if the game is going to refer to the many Japanese characters in the game by their first name most of the time, would that not imply that his first name is Oda and not Sandayu? We can make the argument that V, and mostly everyone else in Night City, are not Japanese and therefore they are either being rude or incompetent, or maybe the formality of this aspect in Japan has waned leading up to 2077, or maybe the Japanese tend to be fine with the "disrespect" that everyone outside of Japan refers to them by western standards... who really knows...
Yes, it's quite possibly the most inane argument ever conceived, but it's frustratingly curious to me why Oda is the odd man out here, and why everything inside the game points to one thing, and everything outside of the game points to another.