# Red Koto — Tuning for Koto by Chieko Mori

> Koto tuning and music study app with 74 tunings by Chieko Mori. (iPhone/iPad app by Oliver Grimm.)

- Source: https://appshunter.io/ios/app/red-koto/id387575031 (this page in markdown: same URL + `.md`)
- Developer: [Oliver Grimm](https://appshunter.io/developer/380669289)
- Category: Music, Education
- Price: $8.99
- Rating: 1.00/5 from 1 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 29 MB
- Languages: American English, Japanese
- Released: 2010-08-24
- Data updated: 2026-09-01
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/red-koto/id387575031/reviews.md

## What is Red Koto?

RedKoto is a growing collection of currently 74 tunings by Koto Virtuoso Chieko Mori. 
Red Koto can be used for tuning the Instrument by ear, for studying scales, or for playing with the different tunings. 

These are the tunings for her compositions and for learning Koto Music at "Koto Studio" in Tokyo. 
The Score of each composition is available separately on demand.

Sounds are played both picked with the left hand and plucked with the right hand using ivory picks. 
 
The middle of the screen represents the 13 strings of the Koto, each string plays a plucked sound at the corresponding pitch.
To the right of the string the note is shown, touching each note produces a picked sound.

The order of the tunings can be re-arranged by long-pressing on a tuning in the list.

Except where noted differently, tunings are based on a root note of 442 Hertz.

CHIEKO MORI KOTO STUDIO
https://www.kotostudio.com

ONLINE STORE
https://store.kotostudio.com

## Key features

- 74 Koto tunings
- Tuning by ear
- Scale study
- Interactive string display
- Plucked and picked sounds
- Customizable tuning order

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/red-koto/id387575031/reviews.md

### 5/5 — 調弦取れた

*2020-05-13, version 2.5.1*

箏の響きが良く音色が美しい。
自分の耳を頼りに調弦が取れるようになれそうです。五感を磨いていける感じがします。

### 1/5 — 最低です！

*2012-06-13, version 1.4.1*

タダでも入りません。700円も出させておいて、クオリティの低さに怒りさえ感じます。このアプリの変な楽器が箏だと思われたら困ります。

### 2/5 — Terrible

*2012-04-07*

I want my money back. It has cheap sound and the most basic features. Horrible layout, not worth 8 dollars!!!!

### 1/5 — Hira-joshi tuning missing...

*2011-11-05*

... This is a large oversight. Also the option to create tunings would be an excellent feature. $7.99 without these features demands a partial refund -or- an update that includes them.

**Developer response:** Hi,
Please understand that this App is about tunings by Chieko Mori. For traditional tunings for the Koto please see the KotoTunings App. Thank You!

### 5/5 — Red Koto

*2010-10-23*

Following on Koto Tunings this app presents another series of tunings for the Koto by master performer Chieko Mori. Red Koto offers tonal combinations that are more adventurous and modern, further away for the Japanese tradition. They are based on Chieko's own tunings, those she uses in her often improvised pieces. The quality of the samples is excellent, but these are a lot more challenging than the traditional ones, especially if combined with instruments tuned in classical western style.
Very interesting and stimulating both for people interested in learning the instrument and those who want to include these beautiful sounds and tonal ranges in electronic music compositions, loops and digital productions.

## Frequently asked questions about Red Koto

### What is Red Koto?

Red Koto is a music application that provides a collection of 74 tunings for the Koto instrument, curated by virtuoso Chieko Mori. It can be used for tuning, studying scales, and playing along with various compositions.

### How many tunings are available in Red Koto?

Red Koto features a growing collection of 74 distinct tunings by Koto Virtuoso Chieko Mori.

### Can Red Koto be used for learning Koto music?

Yes, Red Koto is suitable for learning Koto music, offering tunings used for compositions and study at the Koto Studio in Tokyo.

### Does Red Koto have ads?

No, Red Koto does not contain advertisements, providing an uninterrupted user experience.

### What devices is Red Koto compatible with?

Red Koto is compatible with iPhone, iPad, and iPod devices.

### What is the price of Red Koto?

Red Koto is available for purchase at $8.99.

### When was Red Koto last updated?

The latest version of Red Koto was updated on July 2, 2025.

### What is the age rating for Red Koto?

Red Koto has an age rating of 4+.

## Version history (last 5 releases)

### 2.8.1 — 2025-07-02

Added new tunings: Winter Collection3 /part 1 & 2

### 2.8 — 2025-07-02

Added new tunings: Winter Collection3 /part 1 & 2

### 2.7 — 2024-12-03

Added new tunings: Vltava (The moldau) 1 & 2

### 2.6.3 — 2024-10-17

Added Tuning: Winter Collection 2

### 2.6.2 — 2024-06-27

- changed string 7 in "Flower Butterfly" from G to F#

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## More apps by Oliver Grimm

- [KotoTunings](https://appshunter.io/ios/app/kototunings/id380669286)

All apps by Oliver Grimm: https://appshunter.io/developer/380669289

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-01.*