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Septian Ganendra S. K. (sepTN)

Japanese learning platforms, structured datasets, and open-source engineering

Creator of Jepang.org KanjiFlash WIP Built Yomi Godot contributor Open-source builder

Software engineer, game developer, and Japanese language educator (JLPT certified) building language tools, games, open-source contributions, and Indonesian-first learning platforms. Self-taught since first getting hands on a computer in 1998.

⚙ Godot Engine Contributor

Engine

Publicly credited in the official Godot Engine developers roster through upstream contributions to the project.

open official roster

🧩 GodotSteam Contributor

Code

Named among the GodotSteam code contributors through work contributed back to the project.

open contributors list

⊟ Sentou Gakuen

Games

Long-horizon revival of Sentou Gakuen as a modern online visual novel and MMORPG world, spanning game systems, publishing, and community-facing web infrastructure.

_open_node()

⊟ Kanji.Jepang.org

Kanji

Indonesian-first kanji reference system shaped by large-scale language data, deep lookup workflows, and practical study-oriented information architecture.

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⊟ Gairaigo.Jepang.org

Gairaigo

Japanese loanword reference for connecting katakana vocabulary to meanings, source-language clues, categories, and formation patterns inside the Jepang.org ecosystem.

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⊟ KanjiFlash.com

WIP

Work-in-progress kanji quiz game and future learning product. Current public version is a lightweight static prototype with score, EXP, levels, multilingual routes, schema, and browser-local progress while the full v1 is still being built.

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⊟ Yomi

Lookup

Japanese lookup and reference product that connects English-expression search and kanji lookup in one fast SSR workflow, published as a standalone site at yomi.septn.com.

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⊟ Berita.Jepang.org

News

Indonesian-language Japan news site built for fast publishing, searchable archives, and clear daily coverage across the broader Jepang.org ecosystem.

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⊟ Bunpou Lens

NLP

Client-side Japanese grammar analyzer built around offline-first parsing, browser-native NLP, and low-latency learning workflows.

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⊟ Anime.Jepang.org

Anime

Anime discovery and seasonal release platform for Indonesian users, built as a fast searchable media node inside the broader Jepang.org ecosystem.

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Jepang.org Ecosystem Kanji Gairaigo Anime News Grammar Datasets

A comprehensive Japanese ecosystem for Indonesian users, spanning kanji and gairaigo reference tools, study utilities, searchable media surfaces, and Berita.Jepang.org for current Japan news coverage.

Recent Writing
open /posts
Katakana Is Not Your Friend 2026-04-28

Katakana looks like free vocabulary when you start learning Japanese. The longer you study, the more it reveals a trap: familiar sounds do not guarantee familiar meanings.
Dissecting Yomi: Building a 257K-Page Japanese Reference Site Within Cloudflare Workers Free Limits 2026-04-23

Yomi currently serves about 257K sitemap URLs, but the interesting part is that it does so as a serverless, databaseless SSR system shaped around Cloudflare Workers and Pages free-tier limits.
Showcasing the Godot Pseudo Theme 2026-03-30

This post demonstrates the Godot-inspired interface language used across the site, using theme-style shortcodes and a more visual writing format.