SCI Sierra On-Line Japanese Games
Sierra On-Line released a few games in Japan, fully translated to Japanese.
The 3.25" 1.2MB floppies (Space Quest 4, King's Quest 5) are only readable on PC using special floppy drives, that support Mode 3. For example the Sony USB PCGA-UFD5. Floppies will still not just work in Windows, you will probably need [RawWrite for Windows] and finally [DiskExplorer] to extract the files from the images.
The 5.25" floppies (Quest for Glory 1, Police Quest 2) however can be read using a regular PC 5.25" floppy drive.
Police Quest 2 / ポリスクエスト2 (PC-98)
on 3 5.25" floppies also includes 50-page manual, small poster/ad
Quest for Glory 1 / クエスト フォー グローリィ (PC-98)
on 2x 3 5.25" floppies (1 set is the 16 color version, the other set is the 8 color version)
Quest For Glory / Police Quest 2 3D AVG box set (PC-98)
Police Quest 2: on 3 5.25" floppies Quest for Glory 1: on 2x 3 5.25" floppies (1 set is the 16 color version, the other set is the 8 color version)
Mixed-Up Mother Goose / おかしなマザーグース SCI1 (FM-Towns)
features full Japanese voice acting
King's Quest V / キングズクエストV / キングスクエストV (FM-Towns)
(FM-Towns floppy not shown) features Japanese + English voice acting
King's Quest V / キングズクエストV / キングスクエストV (PC-98)
on 6x 3.25" floppy discs (1.2MB) features Japanese + English text
Castle of Dr. Brain / ドクターブレイン パズルの城 (PC-98)
on 2x 5.25" floppy discs features Japanese + English text
Space Quest IV / スペースクエストIV (PC-98)
on 3x 3.25" floppy discs (1.2MB) features Japanese + English text
Phantasmagoria 2 / ファンタズム2 (PC DOS/Windows)
on 5 CDs includes 40-page b/w manual
Lighthouse / ライトハウス (PC DOS/Windows)
features Japanese voice acting + text