Fukurokuju is a tall man with an elongated bald head. He has a very long and pointed dark beard, and his earlobes are extremely long. He wears a pair of square-shaped sunglasses and a purple kimono with a pattern of yellow rimmed, green circles with three white dots in them, as well the Japanese character 忍 (nin?) on his orange obi. 
Fukurokuju is an opportunistic man who to some degree is willing to forgo the samurai code of loyalty and join the side of those in power, as evidenced by his defection from the Kozuki Family to serve the Kurozumi Family, as well as him pledging the Oniwabanshu's allegiance to Kaido after Orochi's seeming demise. However, whether or not he truly intended to join the Beasts Pirates is uncertain, as he would later rejoin Orochi and continue serving him.
While vigilant in enforcing Orochi's objectives and protecting the shogun, he was patient enough to give Nico Robin one chance to explain herself when she was caught snooping around Orochi Castle. He has shown to be sadistic as he eagerly awaited Oden's death in his painful execution, and mocked Shinobu for putting her hopes on Oden.
Abilities and Powers
As former captain of the Orochi Oniwabanshu, Fukurokuju has full control over the group of 5,000 ninja, formerly in service of Orochi, but currently Kaido. Fukurokuju is also noted to be an extremely skilled master of ninjutsu by Shinobu, a veteran kunoichi. He is stated to be Raizo's biggest rival as a ninja.
Fukurokuju was shown carrying a sword 20 years ago.
Twenty years ago, Fukurokuju and yakuza leader Hyogoro were allied with the Kozuki Family, but when the Beasts Pirates invaded Wano Country and Kurozumi Orochi took over the country, Fukurokuju betrayed the Kozuki Family and pledged to serve Orochi. His subordinate at the time, Shinobu, was disgusted with this and left the Oniwabanshu.
Fukurokuju later accompanied Orochi to Kuri. He was also present in the Flower Capital to witness Kozuki Oden's execution. After Shinobu revealed to the public what Oden did for the citizens during the past five years, Fukurokuju confronted her for her actions. However, she managed to flee as Oden met his end.
Four Emperors Saga
Wano Country Arc
The Orochi Oniwabanshu caught Nico Robin snooping in a secret room in Orochi Castle, and Fukurokuju came into the room and gave her one chance to explain herself. After Robin claimed to be Ushimitsu Kozo, Fukurokuju ordered his ninjas to capture her. However, the Robin they attacked was a duplicate created by her Devil Fruit powers. Fukurokuju then ordered his squad to find her.
As supporters of the Kozuki Family were detained in the Rasetsu District Prison, Fukurokuju told the prisoners to remain silent after telling them that their plan failed. He later went to the palace to report to Orochi about the capture of Shimotsuki Yasuie.
After the Straw Hat Pirates began causing chaos at Rasetsu Town following Yasuie's execution, the Orochi Oniwabanshu entered the battle. Fukurokuju recognized Zoro from a wanted poster and ordered his group to capture at least one of the Straw Hats.
Later, Fukurokuju informed Orochi the Straw Hats' escape and the capture of Trafalgar Law. Fukurokuju also informed the shogun that the Flower Captial was on lockdown with the Orochi Oniwabanshu and the Mimawarigumi on guard. He reassured that he would not let anything harm Orochi until they captured their enemies.
On the day of the Fire Festival, Fukurokuju accompanied Orochi to Onigashima. After Kanjuro informed Orochi that the plot to stop the Kozuki rebellion failed, Fukurokuju reported that no rebel ships nor any suspicious samurai were seen, but Luffy, Zoro, Kid, and Killer were spotted on the island. Fukurokuju later stood at the Performance Stage along with Orochi, Kaido, and the All-Stars as Kaido announced the New Onigashima Project. Fukurokuju watched in complete horror and shock when Kaido betrayed and decapitated Orochi while explaining his plans in detail.
When given the choice to join the Beasts Pirates or die, Fukurokuju quickly pledged his loyalty to Kaido. However, when the Ninja-Pirate-Mink-Samurai Alliance went on the attack and faced the Oniwabanshu, Fukurokuju slipped away unnoticed except by Hotei. He proceeded to rejoin Orochi, who had somehow survived Kaido's decapitation, and attacked members of the Beasts Pirates as the shogun began setting the castle on fire to take revenge.
Fukurokuju and Orochi later ran into the Scabbards, and the shogun tried to take down the samurai himself by transforming into the Yamata no Orochi. However, Fukurokuju witnessed the Scabbards decapitate all of Orochi's heads with a quick combined attack, and would later confront his rival Raizo while the other Scabbards continued moving on.
- Fukurokuju is the name of one of the Seven Lucky Gods in Japanese mythology. Aside from his sunglasses, he also bears a similar appearance to the god, especially his elongated head.