Utau Keikan (The Singing Policeman), Kadokawa Haruki Jimusho 2004
- A police novel dealing squarely about corrupt officers in local police
Tenka Jo (A Conqueror's Castle), Shincho-sha, 2004
- A historical novel written from a point of view of castle building technology
Yunitto (The Unit), Bungeishyunju, 2003
- A mystery story dealing about juvenile delinquency and domestic violence
Kurofune (The Black Ship), Kadokawa Shoten, 2002
-A life story of the last samurai, Nakajima Saburonosuke who did really exist.
Shikku Suru Yume (The Dreaming runs fast), Shogakukan, 2002
- A History of Japanese automobile industry with a fictitious manufacturer in the center of the story
Bokensha Kasutoro (Fidel Castro, The Adventurer) Shueisha 2002
- An inspection of Fidel Castro’s life by composing records and documents
Buyoden (Biography of Takeaki Enomoto), Chuokoron, 2001
- A life story of Takeaki Enomoto, politician of Meiji Era who endeavored to develop Japan by introducing modern technology.
Washinton Fuin Kosaku (A Secret Operation Sealing Washington), Shincho-sha, 1997
- A mystery at the night before of the outbreak of war between Japan and US
Shonanto Ni Ran Ariya (Is there an orchid in Singapore?). Chuokoron, 1995
- A mystery about a plan to assassinate Hideki Tojo, Minister of War in occupied Singapore
Stokkuhorumu no Misshi (A Courier from Stockholm), Shincho-sha 1994
- The third novel of the WWII series (the concluding volume), adventure story at the time of the end of the war. Made into TV drama.
Orokamono no Meiyaku (A Pledge of the Fools), Kodansha, 1991
- A political mystery with a young and ambitious assemblyman as a protagonist
Etorofu Hatu Kinkyu Den (The Urgent telegram from Etorofu)､Shincho-sha, 1989
- The second novel of the WWII series dealing the spy war at the time of Pearl Harbor. Made into TV drama.
Berurin Hikou Shirei (Zero Over Berlin), Shincho-sha, 1988
-The first novel of the WWII series. Story about a zero-fighter plane flew secretly to Berlin during the war.