Study
Define the learning question, review relevant sources, and identify what remains uncertain.
Research-informed education & publishing · Tokyo
Research into books, songs, and learning systems.
ProoProo develops publications, educational songs, learning materials, and prototype systems for language education—while keeping the boundary between a promising design and supported evidence visible.
A responsible translation pathway
01
Research questionsConcepts · sources · constraints
02
Editorial developmentStructure · provenance · rights
03
Testable resourcesMaterials · prototypes · documentation
Claims are labelled by evidence status—not by ambition.
- Established
- June 2019
- Based in
- Tokyo, Japan
- Core work
- Publishing · Educational R&D
- Language contexts
- English · Chinese · Japanese
About ProoProo
A company for careful translation from inquiry to use.
ProoProo Co., Ltd. is a research-informed education and publishing company founded in Tokyo in 2019.
We support publishing, educational product development, and the responsible translation of research concepts into practical learning resources. Our work connects language education, song-supported learning, multilingual materials, and carefully documented prototype systems.
We do not present a framework, prototype, or publication record as proof that a learning product is effective. Each public claim is written to match the evidence presently available.
- Legal name
- ProoProo Co., Ltd. · 株式会社ProoProo
- Founder
- Lingling Liu
- Orientation
- Research-informed, multilingual, evidence-calibrated
How we work
Four disciplines, one documented path.
ProoProo treats design, production, documentation, and evaluation as connected but distinct activities.
Develop
Shape books, songs, sequences, and prototypes around explicit educational purposes.
Document
Record design choices, content provenance, version status, rights, and intended use.
Review
Separate internal checks, user feedback, external review, and empirical evaluation.
Published by ProoProo · August 2023
Selected publication
Research monograph
A Review of Preliminary Studies on Song Utilization in Language Education and the Potential of AI Songs:
Case Studies in English, Chinese, and Japanese
English original · Japanese & Chinese extended abstracts
This cross-language review surveys preliminary studies on song utilization in language education and examines the potential of AI songs. It predates the formal proposal of Scientific Song Design and is presented as part of the research trajectory—not as evidence that a particular method is effective.
- Author
- Lingling Liu
- Publisher
- ProoProo
- ISBN
- 978-4-911177-66-2
The official display title above follows the author-supplied 2023 cover. The Books section of the linked J-GLOBAL researcher record may retain earlier title punctuation while its metadata is being synchronized.
Research & development
Design systems that can be inspected—and eventually tested.
Our R&D work explores how learning content, music, sequencing, review, prompting, and measurement can form a coherent system.
Research orientation
Scientific Song Design
Under theoretical development and public consultation
Scientific Song Design (SSD) is a proposed interdisciplinary research programme for the systematic design, documentation, sequencing, and evaluation of learning songs and song sequences. ProoProo explores responsible applications of these concepts in publishing and prototype development.
References to SSD describe a design and research orientation. They do not constitute independent certification, empirical validation, or proof that a ProoProo product is educationally effective.
Research context on Lingling Liu’s academic websiteSong-sequence learning prototype
A current prototype examines 32 target words across two main songs and one review track, with timestamped records for accuracy, response time, prompt level, and short review playlists. Its purpose is to make sequence decisions and learning evidence more inspectable before larger evaluation.
Song ASong BReviewRecords
Learning materials
Built around purpose, sequence, and traceability.
Programme areas are shown as areas of development. They are not presented as completed or validated commercial products.
Publishing programme
Research and professional publications
Books and editorial projects that make scope, sources, versions, and publication status explicit.
Development area
Song-supported language materials
Language-learning content developed with attention to lyrics, pronunciation, rhythm, melody, target density, and intended learner use.
Prototype area
Sequence and review systems
Prototype structures for ordering, recurrence, variation, prompt reduction, review timing, and learning records across multiple songs.
Rights & partnerships
Collaborate with a clear scope from the start.
ProoProo welcomes carefully scoped conversations with authors, researchers, educators, publishers, rights holders, and technology partners working in language education and learning materials.
- Research-informed publishing and editorial development
- Rights and licensing for publications and educational media
- Documented prototype and learning-material development
- Multilingual projects across English, Chinese, and Japanese contexts
Responsible practice
Credibility lives in the distinctions.
We distinguish design proposals, research-informed practices, prototype functions, and empirically supported findings.
Claim calibration
Promising concepts are described as proposed; effectiveness claims require appropriate empirical evidence.
Provenance
Sources, authorship, versions, AI assistance, and production roles are documented where relevant.
Rights & licensing
Lyrics, recordings, melodies, images, text, data, and third-party materials are treated as distinct rights layers.
Relationship disclosure
Organizational, intellectual, and commercial relationships are disclosed instead of being implied away.
Founder & research leadership
Lingling Liu
Founder, Representative Director & Researcher
Lingling Liu is a language-education researcher whose work examines the design, sequencing, and evaluation of songs for language learning. At ProoProo, she leads research-informed publishing, educational materials development, and the responsible translation of research concepts into practical prototypes.
Her academic profile, publications, and research records are maintained separately on her academic website.
Visit Lingling Liu’s academic websitePublishing · Rights · Partnerships
Begin with the purpose and the evidence boundary.
For publishing, rights, licensing, educational-material, or research-development enquiries, contact ProoProo in English, Chinese, or Japanese.
contact@prooproo.comTokyo, Japan