Izumi Kurokawa
Izumi Kurokawa 6
General Information
Species Human
Age 12 (Ben 10)
13 (Ben 10: Omniverse flashbacks)
17 (Ben 10: Alien Force)
18 (Ben 10: Ultimate Alien and Ben 10: Omniverse)
Affiliations Kurokawa Martial Arts Dojo
Ben's Team
Occupation(s) Student
Master Swordsman
Powers and abilities
Abilities Kenjutsu
Equipment Katana
Relatives Unnamed Parents
Alias Senpai/Sempai (Shiori)
Voice Actor Jennifer Hale
First Appearance The Unnaturals

Izumi Kurokawa is a friend of Shiori and Shiki Sakurai.


Izumi Kurokawa

Izumi in the original series.

Izumi Kurokawa 2

Izumi in Ben 10: Alien Force and Ben 10: Ultimate Alien.

Izumi has dark brown eyes and long, straight, black hair, which is tied in a ponytail with a navy blue ribbon, while letting the rest of it down. In the series Ben 10: Alien Force, she has grown into a beautiful young woman with back-length hair that is still tied in a ponytail with her navy blue ribbon, while letting the rest of it down, she kept her hair that way in Ben 10: Ultimate Alien. In one occasion, her hair was tied in a full ponytail with her navy blue ribbon. In Ben 10: Omniverse, she has her hair cut to a Japanese princess cut.

In Ben 10, she wore a dark blue waistcoat over a white short-sleeved dress shirt with a navy blue tie and a long dark grey skirt. She also had navy blue socks, black shoes and a navy blue wristband on her left wrist.

In the first two seasons of Ben 10: Alien Force and Ben 10: Ultimate Alien, she wears a japanese blazer-type school uniform, which is similar to Shiori's school uniform. This outfit consists of a dark blue blazer with a tight-fitting beige sweater-vest underneath over a long-sleeved dress shirt underneath with a red bow tie, and a dark grey miniskirt. navy blue socks are knee-high instead of thigh-high and wears brown penny loafers.

In one episode of the third season of Ben 10: Alien Force, she wore a black strapless top under a navy blue mini jacket, a short silver necklace, blue skinny pants and black high heels.

In Ben 10: Omniverse, she now wears a dark blue cardigan over a white dress shirt, a dark gray miniskirt, a short silver necklace, black stockings and dark gray high-heeled boots.


Izumi is serious, calm, cold, strict, quiet, indifferent, and mature for her age, even during a fight. Despite her cold demeanor, she is caring and kind-hearted, as she showed concern for Shiki and Shiori, when they were attacked by the Killer Skull Gang. She talks in a polite manner most of the time, even during battle or while taunting her opponents. She apparently doesn't like rudeness or vulgarity as she became very angry when Cash asked if she is like a samurai, meaning that she is pretty aggressive, violent and very frightening when angered. However, her anger seems to be short-lived, as she calmed down and returned to her normal self almost instantly after Cash apologized.

Ben 10: Ultimate Alien

Shiki and Izumi Almost Kiss

Shiki and Izumi almost kiss, but Diagon takes over him.

To be added...

Powers and Abilities

Note: This section is under construction and revision.


  • Her first name "Izumi" is japanese for "fountain", while her last name "Kurokawa" is japanese for "black river".

See also

Main Characters
Ben Tennyson | Gwen Tennyson | Izumi Kurokawa | Kevin Levin | Max Tennyson | Rook Blonko | Ryuji Maruyama | Shiki Sakurai | Shiori Sakurai
Supporting Characters
Julie Yamamoto | Manny Armstrong | Helen Wheels | Alan Albright | Jimmy Jones | Azmuth | Professor Paradox | Cooper Daniels | Ship | Eunice
Other allies
Plumbers (Tack, Vreedle Brothers (Octagon Vreedle, Rhomboid Vreedle), Magister Pyke, Magister Korwak, Magister Hulka, Joel Tennyson, Gordon Tennyson, Betty Jean Tennyson, Wes Green, Edward White, Mrs. Dalton, Mr. Hawkins) | Tetrax Shard | Gluto | Galactic Enforcers (Ultimos, Synaptak, Tini) | Reinrassic III | Myaxx | Xylene | Verdona Tennyson | Colonel Rozum | SATC (Lieutenant Steel) | Galvan (Retaliator) | Sugilite | Ignatius | Sandra Tennyson | Carl Tennyson | Frank Tennyson | Lili Tennyson | Technorg | Harvey Hackett | Hector | Elsgood | Sheriff Mason | Kai Green | Ishiyama | Camille Mann | Kiyoshi Sakurai
Former allies
Elena Validus | Phil | Squire
Deceased Supporting Characters and allies
Devin Levin | Magister Labrid | Magister Prior Gilhil |Pierce | Sir George | Winston | Victor Validus | Kwarrel | The Sentinel | Mizuki Sakurai
Prisoners of Aggregor
Bivalvan | Galapagus | P'andor | Andreas | Ra'ad
Charmcaster | Charmcaster's Stone Creatures | Charmcaster's Stone Animals | Argit | Baz-El | Simian
Generator Rex Heroes
Rex Salazar | Yumi Sakurakouji | Kenji Yamabuki | Bobo Haha | Agent Six | Rebecca Holiday | White Knight | Caesar Salazar | Akira Kazami | Ren Johnson | Edwin Bluestein
Future Heroes
Ben 10,000 (Ultimate Alien) | Ben 10,000 (Alternate Timeline) | Gwendolyn Tennyson (Alternate Timeline) | Shiori Sakurai (Alternate Timeline) | Gwendolyn Tennyson (Alternate Timeline) | Kenny Tennyson (Alternate Timeline) | Devlin Levin (Alternate Timeline) | Kaori Sakurai (Alternate Timeline) | Kaoru Sakurai (Alternate Timeline) | Max Tennyson (Alternate Timeline)
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