Koji Annoura

Speaking & Community

Talks

Selected highlights first, followed by the full speaking archive.

A speaker presenting on stage at PGConf India 2026

Speaking Themes

Talks grow from technologies and methods I have used in practice, including relationships, provenance, migration, open standards, and changes in knowledge over time.

Knowledge Graphs & GraphRAG

Designing knowledge structures that keep context, relationships, and provenance visible.

Neo4j, SQL/PGQ & GQL

Connecting graph thinking with practical query languages, databases, and open standards.

Open Source Data Tools

Connecting communities, tools, and workflows for sustainable data systems.

Real-World Data Modeling

Using graph models to clarify dependencies, migration risks, and business relationships.

Upcoming Talks

Confirmed upcoming sessions and appearances.

2026-11-12

NODES 2026

Beyond One LLM: Tracking Knowledge Changes with Neo4j

Scheduled

Online

Speaker

2026-09 · Date TBD

LibreOffice Conference 2026

Mapping the Evolution of ODF with LibreOffice: Versions, Applications, Interoperability, and Structured Knowledge

Pordenone, Italy

Speaker

2026-09-02

FOSS4G 2026 Hiroshima

From Map Layers to Knowledge Models: Extending Open GIS

Scheduled

Hiroshima, Japan

Speaker

2026-08-09

COSCUP 2026

From SPY×FAMILY to Evolving Knowledge Graph: Analysis of Wikipedia with Neo4j and LLMs

Scheduled

Taipei, Taiwan

Speaker

2026-08-09

COSCUP 2026

Underwater Heritage as an Open Knowledge Graph with Neo4j

Scheduled

Taipei, Taiwan

Speaker

2026-08-08

COSCUP 2026

From JOINs to Graph Thinking: Practical SQL/PGQ in PostgreSQL

Scheduled

Taipei, Taiwan

Speaker

2026-11-12

NODES 2026

Beyond One LLM: Tracking Knowledge Changes with Neo4j

Online

Speaker

2026-03-13

PGConf India 2026

Fair Coffee, Fair Data: Practical Bias Detection in Coffee Supply Chains with PostgreSQL

Bengaluru, India

Speaker

2026-03-09

FOSSASIA Summit 2026

Fair Coffee, Fair Data: Bias Detection in Coffee Supply Chains with PostgreSQL SQL/PGQ and GQL

Bangkok, Thailand

Speaker

2025-11-06

NODES 2025

From Sushi to Semantics: A GraphRAG-Powered Japanese Food Explorer with Neo4j and MCP

Online

Speaker

2025-08-09

COSCUP 2025

Japanese Food Knowledge Graph for Taiwanese

Taipei, Taiwan

Speaker

2024-11-07

NODES 2024

Earthquake Knowledge Graph in Japan

Online

Speaker

Yearly Archive

2026

2026-06-20

LibreOffice Kaigi 2026

Handling Business Card Connections with LibreOffice（Base + PostgreSQL + SQL/PGQ）

Tokyo, Japan

Speaker

2026-03-13

PGConf India 2026

Fair Coffee, Fair Data: Practical Bias Detection in Coffee Supply Chains with PostgreSQL

Bengaluru, India

Speaker

2026-03-09

FOSSASIA Summit 2026

Fair Coffee, Fair Data: Bias Detection in Coffee Supply Chains with PostgreSQL SQL/PGQ and GQL

Bangkok, Thailand

Speaker

2026-02-28

Neo4j Users Group Meetup #55

From the Ocean Floor to the Future — Underwater Heritage and Knowledge Integrity in the Age of AI

Fukuoka, Japan

Speaker

2026-02-10

Neo4j Users Group Meetup #54

Beginner-Friendly Introduction to Cypher and Practical Usage: From Fundamental Concepts to Performance and RDB Integration (Cypher 5 / 25)

Tokyo, Japan

Speaker

2026-02-06

AGI Fukuoka #9

LLMs Change. Knowledge Shouldn’t. So Where Should Knowledge Live?

Fukuoka, Japan

LT

2025

2025-11-06

NODES 2025

From Sushi to Semantics: A GraphRAG-Powered Japanese Food Explorer with Neo4j and MCP

Online

Speaker

2025-09-05

LibreOffice Conference 2025

Creating University-Specific Thesis Templates in LibreOffice: A Step Toward Wider Use in Japan and Asia

Budapest, Hungary

Speaker

2025-08-09

COSCUP 2025

Japanese Food Knowledge Graph for Taiwanese

Taipei, Taiwan

Speaker

2025-03-14

FOSSASIA Summit 2025

Vector Impact on Similarity Extraction: Movie Data Analysis

Online

Speaker

2024

2024-11-16

Open Source Conference 2024 Ehime

データ取得変換(ETL)が簡単なApache Hopワークショップ。 - グラフデータベースNeo4jワークショップ。

Ehime, Japan

Speaker

2024-11-07

NODES 2024

Earthquake Knowledge Graph in Japan

Online

Speaker

2024-11-03

COSCon'24

Analyzing the Relationship Between Open Source Communities and Books Using Vector and Graph Theory

Online

Speaker

2024-09-29

Open Source Conference 2024 Hiroshima

グラフデータベースNeo4jワークショップ。 - データ取得変換(ETL)が簡単なApache Hopワークショップ。

Hiroshima, Japan

Speaker

2024-09-07

Open Developers Conference(ODC)2024

グラフデータベースNeo4jワークショップ。 - データ取得変換(ETL)が簡単なApache Hopワークショップ。

Tokyo, Japan

Speaker

2024-08-04

COSCUP 2024

Enhancing Comic Search with Vector Index

Taipei, Taiwan

Speaker

2024-05-25

Open Source Conference 2024 Nagoya

LLMをNeo4jで使った知識グラフ(Knowledge Graph)の使い方。 - LibreOffice + Apache Hop + ChatGPT / Gemini

Nagoya, Japan

Speaker

2023

2023-12-09

Open Source Conference 2023 Fukuoka

Neo4j入門と最近の話題 - Apache Hopを使ったデータオーケストレーション：とにかくデータ収集を自動化してみよう。

Fukuoka, Japan

Speaker

2023-11-12

Open Source Conference 2023 Hiroshima

Neo4jで広がる知識の世界：ナレッジグラフと大規模言語モデル（LLM）で遊んでみよう。 - Apache Hopを使ったデータオーケストレーション：とにかくデータ収集を自動化してみよう。

Hiroshima, Japan

Speaker

2023-07-29

COSCUP 2023

Let's create a family tree of SPY×FAMILY using a graph database!

Taipei, Taiwan

Speaker

2022

2022-11-26

Open Source Conference 2022 Online Fukuoka

Apache Hopデータオーケストレーション入門（データ収集を自動化しよう） - Neo4jグラフデータベースに日本全国の駅データを取り込んでみよう）

Online

Speaker

2022-11-17

NODES 2022

Coffee Knowledge Graph

Online

Speaker

2022-10-29

Open Source Conference 2022 Online Fall

Apache Hopデータオーケストレーション入門（データ収集を自動化しよう） - Neo4jグラフデータベース入門（Neo4j 5.1を使って入門してみよう）

Online

Speaker

2022-10-01

Open Source Conference 2022 Online Hiroshima

データ統合プラットフォーム Apache Hop 2.0のご紹介 - Neo4jグラフデータベースのNeoDash 2.0でOpenStreetMapを使ったダッシュボードを作ろう。

Online

Speaker

2022-09-29

LibreOffice Conference 2022

Using graph theory, let's look at the addition, modification, and removal of features in all versions of LibreOffice. - Let's calculate with Math using MathType and Mathematica

Milan, Italy

Speaker

2022-07-30

COSCUP 2022

Exploring the Secrets of Star Trek "Stardate" with Apache Hop and Neo4j - Importing data from multiple resources into Spreadsheet is easy with Apache Hop

Online

Speaker

2022-07-30

Open Source Conference 2022 Online Kyoto

データ統合プラットフォーム Apache Hop 2.0のご紹介 - グラフデータベース Neo4j、新しいツール、問い合わせ言語GQLの話

Online

Speaker

2022-07-16

LibreOffice Kaigi 2022

CalcにApache Hopを使ってさまざまなデータを簡単に取り込もう

Online

Speaker

2022-06-19

JJUG CCC 2022 Spring

Javaのビルドやバージョンの違いをグラフデータベースで理解する。

Online

Speaker

2022-03-25

Neo4j Users Group Meetup #41

「RDB/CSVからNeo4jへのバッチ移行をいろいろ試してみる」Data Importer, Apache Hopの紹介

Tokyo, Japan

Speaker

2021

2021-11-18

db tech showcase 2021

Neo4jのKeyMakerを使ってデータ分析をしてみよう。

Tokyo, Japan

Speaker

2021-10-23

Open Source Conference 2021 Online/Fall

GRANDstackを使ってハリーポッターの人物相関図を見てみよう - Apache HOP (Incubating) の入門ワークショップ

Online

Speaker

2021-06-17

NODES 2021

Controlling Cypher Queries with Voice

Online

Speaker

2020

2020-11-04

db tech showcase 2020

ストリームデータ処理 Apache KafkaにNeo4jデータベースを使った統合システム

Tokyo, Japan

Speaker

2020-08-02

COSCUP 2020

Graph Powered COVID-19 Japan Tracker

Online

Speaker

2019

2019-12-09

Fukuoka.LT

グラフデータベースは如何に自然言語を理解するか?

Fukuoka, Japan

LT

2019-12-08

SocioInfo#19

データ分析をNeo4jで知識にする

Japan

Speaker

2019-09-25

db tech showcase 2019

グラフデータベースは如何に自然言語を理解するか?

Tokyo, Japan

Speaker

2019-08-18

COSCUP 2019

Graph-Powered Translation Model

Taipei, Taiwan

Speaker

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