So here's a question: it's been established in L5R 5e that the katana doesn't exist at the Dawn of the Empire (given that Yasurugi literally does not believe that steel can be folded). On top of that, we've got it officially that Shiba's sword is a chokuto, and Yasurugi (Yasarugi? I didn't check myself) made a tsurugi for Emperor Hantei.
Unofficially, DGL has suggested that the katana was invented some time in the 4th Century IC, and I would infer that the wakizashi didn't really pre-date the katana, or at least not significantly.
Now while this would normally be just an interesting "oh it happened 700-1,000 years ago" trivia bit, the game I'm currently running is set in Dawn of the Empire era, year 39. My players are going to be receiving their daisho soon when they are officially inducted into their clans.
So what represents the "Soul of the Samurai" and the "Honor of the Samurai" during this era? What weapons did Akodo choose to be so important that for a peasant to touch it meant execution?