NLP / DOCUMENT UNDERSTANDING

From how a document looks,
to how a machine reads it.

Same text, different font, margins or headings — does a machine still recover the same structure? I study the link between document-structure understanding and RAG retrieval, and build systems that use it.

M1 at Science Tokyo · NLP · international student from China
Graduating 2028 / targeting AI/ML engineering and R&D roles / formerly back-end on banking core systems

The table, page and figure buttons change the lens on the same document.

FIG. 01 / DOCUMENT ATLASSELECT A LENS
文書は、関係の集まり。 自作の架空資料です。文書内の画像、複雑な表、脚注の構造上の関係を青い線で示しています。モデルの出力ではありません。 DOCUMENT STUDY / 01 架空資料 / EDITORIAL STUDY DOCUMENT 01 / FICTIONAL 文書は、関係の集まり。 自作の幾何図 図と本文の対応 本文の参照は、図題と 同じ対象を示しているか。 図1を参照 → 区分 複数列の見出し 注 結合セル 本文A 図1 ※1 本文B 表2 ※2 ※1 本文に対応する補足。 ※2 別ページの例外を参照。 01 / FIGURE 何を描いた図か。 画像領域・図題・本文参照 02 / TABLE どの値の、見出しか。 多段見出し・結合セル・脚注 03 / CROSS-PAGE 別のページへ、続く。 条件・例外・根拠のつながり 自作の模式図です。実在資料・モデルの推論・研究結果を示すものではありません。
01

One page, several structures.

Headings, tables, figures, notes. The relations between them decide how the document reads.

The atlas is a hand-made explanatory drawing with Japanese sample text, not model output or an experimental result.

PROJECT 01Public demo · maintained

J-Grad Admission RAG

Turns graduate-admission guidelines into applicant guidance that cites the official page

PROJECT 02In development (phase 2: subtitles, replies, document answers and review working)

Japanese Speaking Coach

A Windows app for the moment you are mid-conversation in Japanese: furigana subtitles and replies you can say as they are; the recommended reply leads with its conclusion and can answer from your own course documents with a citation

02Research map

papers → directions → my questions

I study where necessary evidence can be lost when a system answers from documents. Retrieval-augmented generation, or RAG, finds relevant material and uses it to produce an answer. Documents mix current rules, obsolete clauses and exceptions. Reading the words is not enough if their validity or conditions are lost. My aim is to vary state representations or typography while keeping the wording fixed, and examine retrieval, reading and evidence use separately.

No theme has reached a formal conclusion yet. Each theme carries one of the four states below. · 65 papers · 7 directions · 4 themes · 183 relations

03Working with AI

Read the records →

What I delegated and where I re-decided. Not just the results — the judgement and the verification, kept.

Start with collaboration and verification practices you can use in other AI development, then move into project-specific design problems.

RECORD FORMAT

what happened → human correction → evidence

Last updated 2026-10-26