Masako Katsuki (勝生 真沙子 Katsuki Masako?), née Masako Shiono (塩野 雅子 Shiono Masako, born October 15, 1958) is a veteran seiyū who was born in Hachinohe, Aomori. She is currently employed by 81 Produce and has voiced in several notable films and tv series. Some of Katsuki's best known roles are Maria Von Trapp (Trapp Ikka Monogatari), Reccoa Londe (Zeta Gundam), Maya Kitajima (Glass Mask), Masuyo Ikari (High School! Kimengumi), Michiru Kaioh/Sailor Neptune (Sailor Moon series), and Tsunade (Naruto)
- Name is sometimes mistranslated as Masako Katsuo
- Name is sometimes incorrectly spelled as 勝木真沙子 (the second kanji for "ki" being different)
- Bloodtype: A
- Height: 163 cm
- Hobbies: Golf, knitting, skiing
- Debut Voice role: Mary Scott in Shiroi Kiba: White Fang Monotagari
- Favorite Colors: Pink and black 
- Currently Affiliated with 81 Produce (formerly Theater Echo)
- Although not noted at the Internet Movie Database, according to the Anime News Network as of early March 2007, Katsuki is one of the more prolific  female seiyū with 150 roles credited to her name.
- Voice is said to be identical to seiyu Yuriko Yamaguchi.
- Likes cats
Following her debut in the early 80s, Katsuki has lent her voice to anime, Japanese-dubbed films, games, drama CDs and commercials.
Katsuki’s sensual, dignified voice quality is what distinguishes her the most in her performances. From nice and rational (Sailor Neptune) to hotheaded (Tsunade, Ikari) and playful (Ceilia von Spitzweg, Maria), she tends to mainly play strong, beautiful female characters. On this account, there are many characters Katsuki plays who is a noble, a mother or an elder sister, especially an intellect or an adult. There were a few cases, but Katsuki also voiced boys.
Like the above-mentioned Masuyo Ikari from Kimengumi, Katsuki also tends to play a teacher or tutor, especially an irritable teacher much like Ikari (Kouda Jasmine). And finally, there are also many positions of a villain or rival (Remi Mizuchi, Yamato, Kayura, Sheffield, Zakuro).
In 2009, Katsuki did narration for the program Bakushou Mondai no Nippon no Kyouyou (爆笑問題のニッポンの教養).
- Junko Takeuchi (the star of Naruto)
- In January 2006, Katsuki appeared as a guest on Oh! NARUTO NIPPON, a radio talk show hosted by Takeuchi where she gets to chat with the other seiyu of Naruto. Aside from doing an oiroke no jutsu and a special message, Katsuki also gave Takeuchi some advice on golf and played cho-han bakuchi with her.
- Megumi Toyoguchi (81 Produce member)
- Toyoguchi mentioned in her official blog that the voice actor she really admires and wishes to aim for is Katsuki herself. In addition, Toyoguchi said that her favorite roles of Katsuki are the heroines Maria and Tiara.
- Alexandria in Buso Renkin
- Amalia Lambert in Kishin Taisen Gigantic Formula
- Anego in Zoids Fuzors
- Aquamarine in Metal Fighter Miku
- Aya Misaki in Oniisama e...
- Cecilia von Spitzweg in Kyo Kara Maoh!
- Chiho Kazamaki in Great Dangaioh
- Cloud Nine in D.Gray-Man
- Diane Lance in Kiko Senki Dragonar
- Female doctor/Asuka's stepmother in Neon Genesis Evangelion
- Haku Sanshi and Ribi in The Twelve Kingdoms
- Hell in Weiss Kreuz
- Hotaru in Samurai Champloo
- Ikari Masuyo in Highschool! Kimen-gumi
- Karen's stepmother in Code Geass
- Kiishimu in Tsubasa Chronicle
- Kouda Jasmine in St. Luminous Mission High School
- Kunie Yoshiko in The Brave Fighter of Sun Fighbird
- Kyoto Sakurai in Salaryman Kintaro
- Lady Kayura in Yoroiden Samurai Troopers
- Lieutenant Judy in Linebarrels of Iron
- Memory Gene in Sonic Soldier Borgman
- Tamami Yanagi in Bakusou Kyoudai Let's & Go
- Maya Kitajima in Glass Mask (1984 TV Series)
- Maria Kutchera in Trapp Ikka Monogatari
- Miyabi Sakakibara in Seraphim Call
- Mya the cat in Mirai Keisatsu Urashiman
- Otohime (Liù Xīng Lóng) in Dragonball GT
- Otsuu's mother in Gintama
- Pajiramon in Digimon Tamers
- Ms. Chono in Yu-Gi-Oh!
- Paulamoni in Princess Tutu
- Peter in Tokusou Kihei Dorvack
- Ran'Tao and Sōma Yoshino in the Bleach anime.
- Reccoa Londe in Mobile Suit Zeta Gundam
- Sheffield in Zero no Tsukaima (2nd & 3rd season)
- Sailor Neptune in Sailor Moon series
- Tamaki in Darkside Blues
- Tekka no Maki-chan in Anpanman (2nd generation)
- Tiara in Dragon Warrior: Legend of the Hero Abel
- Tsunade in Naruto
- Yamato (Cassidy) in Pocket Monsters series
- True Water Goddess in InuYasha
- Consult to Captain Tessa Full Metal Panic!
- Zen Takazuchiya in Kamikaze Kaito Jeanne
- Zena Leon in Starship Girl Yamamoto Yohko
- Liz in Vandread Second Stage
- Deunan Knute in Appleseed
- Faranguis in The Heroic Legend of Arslan
- Eluma in Cool Devices
- Emeraldas in Harlock Saga
- Natsume in Ranma ½ OVA
- Asuka Saeko/Demonic Lady in Dream Hunter Rem
- Mitsuki Utsunomiya in Papa to Kiss in the Dark
- Reiko Kashiwara and Miko Akaiki in Gunbuster
- Shazara in Dangaioh
- Hildegard von Mariendorf in Legend of the Galactic Heroes
- Remi Mizuchi in Sukeban Deka
- Rockfell in Hades Project Zeorymer
- Yuuri Kenbishi in Yukan Club
- Princess Bala in Antz
- Zakuro in Ninja Scroll
- Reccoa Londe in Mobile Suit Zeta Gundam Trilogy
- Dory in Finding Nemo (trailer only)
CD (Drama, Albums, Character Songs)
- Ame ha suki desu ka (雨は好きですか)
- Sayonara no Daimeshi (さよならの代名詞) Yoroiden Samurai Troopers, BEST FRIENDS CD)
- Denji Sentai Mega Ranger (Neji Yellow)
- K-tai Investigator 7 (Phone Braver 02)
- Kamen Rider Kiva (Silkmoth Fangire)
- Mahou Sentai Magiranger (Neries the Siren)
- As Sharon Stone
- As Jodie Foster
- Austin Powers in Goldmember (Foxy Cleopatra)
- Nikita (Nikita)
- Will & Grace (Grace Adler)
- The Towering Inferno (Patty Simmons)
- ER (Kim Legaspi)
- Indepedence Day (Constance Spano)
- Pulp Fiction (Mia Wallace)
- Courage Under Fire
- Transformers: Revenge of the Fallen (Arcee)
- Harry Potter and the Goblet of Fire (Rita Skeeter)
- Constantine (Gabriel) (TV Version)
- Official 81 Produce Profile (Japanese)
- Audio drama roles at Audio Wiki (English)
- Katsuki's IMDb resume (English)
- Seiyuu Database WWW Profile (Japanese)