In Japanese culture, victories in battle were often celebrated through various ceremonies and festivities, but there aren't many documented examples of Nyotaimori directly associated with samurai or their victories. The concept of offering such an extravagant experience may have been more of a reflection of the standards of refinement and elegance that emerged in later culinary cultures.

However, it is important to note that Nyotaimori has deeper roots in Japanese culture and is not limited solely to an association with samurai or their victories. Therefore, while it is an interesting idea, we should be cautious in generalizing or drawing direct connections that are not historically documented.

It is possible that this idea comes from mythology or from romanticized interpretations of Japanese traditions. There is a degree of fantasy and legend surrounding the image of the samurai, and there is little historical evidence to support that Nyotaimori was specifically used to celebrate samurai victories.

Some assert that it originated in the Samurai period of Japanese history serving as celebrating of defeating an enemy. Samurai would carouse at a Geisha house, relishing in their victory. Others say that it originated in Japanese crime families, enjoyed by rich and powerful Yakuza members.