discography:
- catalog: AFC-01002
  date: '2003-06-27'
  link: album/23413
  reprint: false
  roles:
  - Illustrator
  titles:
    en: THE MYTHICAL DETECTIVE LOKI RAGNAROK Sound Track Vol.1
    ja: TVアニメーション 魔探偵ロキRAGNAROK サウンドトラック①
    ja-latn: TV Animation Matantei Loki RAGNAROK Soundtrack (1)
  type: anime
- catalog: AFC-01003
  date: '2003-09-26'
  link: album/23414
  reprint: false
  roles:
  - Illustrator
  titles:
    en: THE MYTHICAL DETECTIVE LOKI RAGNAROK Sound Track Vol.2
    ja: TV アニメーション 魔探偵ロキRAGNAROK サウンドトラック②
    ja-latn: TV Animation Matantei Loki RAGNAROK Soundtrack (2)
  type: anime
- catalog: YFCA-1701
  date: '2005-11-02'
  link: album/140903
  reprint: false
  roles:
  - Illustrator
  titles:
    en: Papa to♥KISS IN THE DARK Character songs
    ja: パパと♥KISS IN THE DARK Character songs
    ja-latn: Papa to♥KISS IN THE DARK Character songs
  type: anime
- catalog: SVWC-7331
  date: '2006-01-25'
  link: album/26305
  reprint: false
  roles:
  - Cover Picture
  titles:
    en: JIGOKU-SHOUJO Original Soundtrack
    ja: 地獄少女 オリジナルサウンドトラック
    ja-latn: JIGOKU-SHOUJO Original Soundtrack
  type: anime
- catalog: SVWC-7348
  date: '2006-04-19'
  link: album/26306
  reprint: false
  roles:
  - Cover Picture
  titles:
    en: JIGOKU-SHOUJO Original Soundtrack II
    ja: 地獄少女 オリジナルサウンドトラック II
    ja-latn: JIGOKU-SHOUJO Original Soundtrack II
  type: anime
- catalog: SVWC-7440
  date: '2007-01-24'
  link: album/26308
  reprint: false
  roles:
  - Cover Picture
  titles:
    en: JIGOKU-SHOUJO -FUTAKOMORI- Original Soundtrack
    ja: 地獄少女 二籠 オリジナルサウンドトラック
    ja-latn: JIGOKU-SHOUJO -FUTAKOMORI- Original Soundtrack
  type: anime
- catalog: SVWC-7454
  date: '2007-03-21'
  link: album/26309
  reprint: false
  roles:
  - Cover Picture
  titles:
    en: JIGOKU-SHOUJO -FUTAKOMORI- Original Soundtrack II
    ja: 地獄少女 二籠 オリジナルサウンドトラック II
    ja-latn: JIGOKU-SHOUJO -FUTAKOMORI- Original Soundtrack II
  type: anime
- catalog: SVWC-7597
  date: '2008-12-17'
  link: album/21681
  reprint: false
  roles:
  - Cover Picture
  titles:
    en: JIGOKU-SHOUJO -MITSUGANAE- Original Soundtrack ~NIKUSHOKU~
    ja: 地獄少女 三鼎 オリジナルサウンドトラック～肉喰～
    ja-latn: JIGOKU-SHOUJO -MITSUGANAE- Original Soundtrack ~NIKUSHOKU~
  type: anime
- catalog: SVWC-7612
  date: '2009-03-04'
  link: album/21682
  reprint: false
  roles:
  - Cover Picture
  titles:
    en: JIGOKU-SHOUJO -MITSUGANAE- Original Soundtrack ~SOUSHOKU~
    ja: 地獄少女 三鼎 オリジナルサウンドトラック ～草喰～
    ja-latn: JIGOKU-SHOUJO -MITSUGANAE- Original Soundtrack ~SOUSHOKU~
  type: anime
- catalog: PCCG-70067
  date: '2010-08-18'
  link: album/23922
  reprint: false
  roles:
  - Illustrator
  titles:
    en: 'Sparky☆Start / Katate☆SIZE [Kana Ienaga, Yukionna, Yura Keikain (CV: Aya
      Hirano, Yui Horie, Ai Maeda)]'
    ja: 'Sparky☆Start / 片手☆SIZE [家長カナ・雪女・花開院ゆら (CV: 平野綾, 堀江由衣, 前田愛)]'
    ja-latn: 'Sparky☆Start / Katate☆SIZE [Kana Ienaga, Yukionna, Yura Keikain (CV:
      Aya Hirano, Yui Horie, Ai Maeda)]'
  type: anime
- catalog: PCCG-01123
  date: '2010-12-15'
  link: album/23927
  reprint: false
  roles:
  - Illustrator
  titles:
    en: 'Nurarihyon no Mago Character CD Series: Kana Ienaga / Yura Keikain'
    ja: アニメ「ぬらりひょんの孫」キャラクターＣＤシリーズ 家長カナ/花開院ゆら
    ja-latn: 'Nurarihyon no Mago Character CD Series: Kana Ienaga / Yura Keikain'
  type: anime
- catalog: PCCG-01124
  date: '2011-01-19'
  link: album/23928
  reprint: false
  roles:
  - Illustrator
  titles:
    en: 'Nurarihyon no Mago Character CD Series: Rikuo Nura / Kiyotsugu & Shima'
    ja: アニメ「ぬらりひょんの孫」キャラクターCDシリーズ 奴良リクオ/清継＆島
    ja-latn: 'Nurarihyon no Mago Character CD Series: Rikuo Nura / Kiyotsugu & Shima'
  type: anime
- catalog: PCCG-70117
  date: '2011-07-27'
  link: album/26396
  reprint: false
  roles:
  - Cover Illustrator
  titles:
    en: 'Orange Smile / Katate☆SIZE [Kana Ienaga, Yukionna, Yura Keikain (CV: Aya
      Hirano, Yui Horie, Ai Maeda)]'
    ja: 'Orange Smile / 片手☆SIZE [家長カナ・雪女・花開院ゆら (CV: 平野綾, 堀江由衣, 前田愛)]'
    ja-latn: 'Orange Smile / Katate☆SIZE [Kana Ienaga, Yukionna, Yura Keikain (CV:
      Aya Hirano, Yui Horie, Ai Maeda)]'
  type: anime
- catalog: ESCL-4876
  date: '2017-07-12'
  link: album/67092
  reprint: false
  roles:
  - Cover Illustrator
  titles:
    en: Noise / Mio Yamazaki [Limited Edition]
    ja: ノイズ / ミオヤマザキ [期間生産限定盤]
    ja-latn: Noise / Mio Yamazaki [Limited Edition]
  type: anime
featured_on: []
info:
  Credited works: 14 albums in database
  Credits:
  - 6 illustrator
  - 6 cover picture
  - 2 cover illustrator
link: artist/74500
meta:
  added_date: 2025-08-09T10:19
  edited_date: 2025-08-09T10:19
  fetched_date: 2026-01-04T04:18
  ttl: 86400
  visitors: 53
name: Mariko Oka
name_real: 岡 真里子
name_trans: おか まりこ
notes: Japanese animator, animation director & character designer.
type: Individual
vgmdb_link: https://vgmdb.net/artist/74500?perpage=99999
websites:
  Reference: []
