Brian Kadokura

Kadokura presents a respectable public face through wealth and philanthropy, but in private he is forceful, impatient and accustomed to having subordinates carry out his orders. He treats the Hakodate treasure as something to be acquired rather than an archaeological or historical discovery.

His interest intensifies because the treasure is rumored to have had the potential to change the course of World War II. He is prepared to use intimidation and violence to obtain the information needed to locate it.

Kadokura becomes increasingly frustrated whenever Kaitou Kid, Conan Edogawa or Heiji Hattori interferes with his search.

Kadokura commands a group of armed subordinates and has access to substantial money, weapons and logistical resources. His influence extends across Asia through his illicit business activities.

He personally carries a firearm and is willing to use it when confronting opponents. His organization is capable of surveillance, kidnapping, armed attacks and coordinated operations around Hakodate.

Kadokura is not portrayed as an elite swordsman or detective. His strength comes primarily from resources, criminal connections and his willingness to employ violence.

Kadokura enters the investigation when the Hokkaido police reveal that the seemingly charitable Japanese-American businessman has another identity. Behind his public reputation, he is an international arms dealer operating throughout Asia and known as the "Merchant of Death."

He seeks the treasure hidden by Keizaburo Onoe, believing that the historical swords scattered around Hakodate provide the clues needed to find it. His hunt overlaps with Kid's pursuit of the same swords and with the investigation into a sword-related murder.

Kadokura and his men escalate their search through shootings, kidnapping and bombings. They target Takuzo Onoe and Ginzo Nakamori, kidnap Ryoe Fukushiro and attempt to force the location of the treasure from the people who solve its clues.

The treasure is eventually revealed not to be the superweapon Kadokura expected. Its true significance lies in a wartime code-breaking device, leaving his violent search for a transformative weapon built on a mistaken understanding of what was hidden.

Nacho Belga is one of Kadokura's armed subordinates and follows his orders during the search for the Onoe treasure.

Keizaburo Onoe is the former head of the Onoe family who hid the treasure Kadokura seeks in Hakodate.

Takuzo Onoe is the current Onoe family head and becomes an obstacle in Kadokura's search. [Brian D. Kadokura orders violence against Takuzo Onoe while pursuing the treasure.](#spoiler)

Kaitou Kid competes for the historical swords connected with the treasure, repeatedly interfering with Kadokura's efforts to collect the necessary clues.

Conan Edogawa and Heiji Hattori investigate the murders and sword mystery surrounding Kadokura's activities. They ultimately reconstruct the method for locating the treasure before Kadokura can exploit it.

Ryoe Fukushiro becomes a target of Kadokura's group. [Kadokura's men abduct Ryoe Fukushiro while trying to secure the information necessary to reach the treasure.](#spoiler)