Original developer of the 1994 PC-98 doujin game Space Panicco (すぺーす ぱにっ娘) — graphics and BGM.
I preserve and reconstruct historical software from the Japanese retro computing scene, and publish open specifications and tools related to that culture.
日本のレトロコンピュータ文化に関する歴史的ソフトウェアの保存・再構築、および関連するオープンな仕様・ツールの公開を行っています。
Website: motoikenkichi.com
| Area | Start here |
|---|---|
| PC-E500 music & games | PLAY3 Archive · Building Rescue |
| PC-98 game archive | Space Panicco Archive |
| Shared culture / license | AAAPS |
| Pocket CPU reference | SC62015 Opcode Reference |
| Browser games / tools | kanji-hyper-war · PC-6001 / PC-8001 editors |
- SHARP PC-E500 series pocket computers
- NEC PC-9801 DOS platform
- Japanese magazine / BBS era software culture
- Open licensing for shared internet characters & AA culture
| Repository | What it is |
|---|---|
| PLAY3-Archive | Three-voice buzzer music driver (Pocket Computer Journal, 1993). Real-hardware verified. Bottakuri Shouten from this set is used as BGM in Space Panicco. |
| Building-Rescue-Archive | PC-E500 action game (1994). Pseudo grayscale LCD technique on title/ending. |
| Space-Panicco-Archive | PC-98 platform action game (1994). Original author archive; includes VMAP editor. |
| pc-e500-software-guide | English introduction / guide to SHARP PC-E500 software. |
| sc62015-opcode-reference | Reconstructed SC62015 opcode reference from historical printed material. |
| Repository | What it is |
|---|---|
| aaaps | AAAPS (Ascii Art Appropriation Protection Specification) — license / governance template to keep shared AA and internet characters from exclusive enclosure. |
| Repository | What it is |
|---|---|
| kanji-hyper-war | Browser shooter: fire on kanji (invader / Galaga style). |
| pc6001-gfx-editor | Browser pixel-art editor for NEC PC-6001. |
| pc8001-semigfx-editor | Browser semi-graphic editor for NEC PC-8001. |
| Repository | What it is |
|---|---|
| kuzuhascript-utf8 | UTF-8 / modern Perl port of kuzuhascript (くずはすくりぷと). |
| kuzuhascript-archive | Historical preservation of the original Kuzuha Script. |
| ksphp-plus-gikonekos | Unofficial KSPHP Plus derivative (multilingual, maintenance). |
| ksphp-plus-gikonekos-archive | Development archive for the above. |
| legacy-bbs-toolkit | Preprocessing foundation for Japanese BBS log archives (spec in progress). |
| zantei-utf8 | UTF-8 conversion, security hardening, and Perl 5.38+ update for the あやしいわーるど＠暫定 CGI script set (kuzuhascript-based). |
| -to-utf8-php | Generic CP932 / EUC-JP → UTF-8 converter (PHP). |
| ng-check-php | NG-word checker with hashed dictionary (PHP). |
If you enjoy the archives, tools, or games, please consider supporting the work.
PayPal: https://www.paypal.com/paypalme/gikonekos
- Website: motoikenkichi.com
- YouTube: https://youtube.com/@gikonekosw
- X: https://x.com/qptn
- Hackaday (PLAY3): https://hackaday.com/2026/03/17/polyphonic-tunes-on-the-sharp-pc-e500/
- Hackaday (SC62015): https://hackaday.com/2026/03/26/reconstructed-sc62015-opcode-reference-for-sharp-pocket-computers/
Discussions are open on individual project repositories (e.g. Building Rescue Discussions). Feel free to introduce yourself there.