Looking through the results for her Kanji, she also composed Metalgun Slinger for GBA in 2002.
Edit: Both games are developed by Open Sesame so one could look up what other games they did.
Edit2:
This is their website. Their list of products is extensive and up to date. happy digging
Edit3: This is way too much fun. The Starship Damrey, a Guild 2 game Open Sesame did for Level 5 and was internationally released as a 3DS eShop title, is also composed by her. For me this is confirmation enough that she's very likely responsible for most if not all of Open Sesame's sound and music work. I'm out now.