This reservation system is for the following hotels.
| RIHGA Royal Hotel Osaka | Osaka |
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| RIHGA Royal Hotel Tokyo | Tokyo |
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| RIHGA Royal Hotel Kyoto | Kyoto |
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| RIHGA Royal Hotel Hiroshima | Hiroshima |
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| RIHGA Royal Hotel Kokura | Fukuoka |
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| RIHGA Royal Hotel Niihama | Ehime |
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| RIHGA Nakanoshima Inn | Osaka |
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| RIHGA Royal Hotel Sakai | Sakai, Osaka |
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| Kuroyon Royal Hotel | Nagano |
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| RIHGA Hotel Zest Takamatsu | Kagawa |
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| Amadeus | Apollo/Galileo | Sabre | Worldspan | |
|---|---|---|---|---|
| RIHGA Royal Hotel Osaka | WW OSAOSA | WW 00724 | WW 13083 | WW RROSA |
| RIHGA Royal Hotel Tokyo | WW TYORHW | WW 86103 | WW 675 | WW RRWAS |
| RIHGA Royal Hotel Kyoto | WW UKYKYO | WW 00713 | WW 13084 | WW RRKYO |
| RIHGA Royal Hotel Hiroshima | WW HIJHIR | WW 00707 | WW 6631 | WW RRHIR |
| RIHGA Royal Hotel Kokura | RR KKJKOK | RR 00709 | RR 45737 | RR RRKOK |
| RIHGA Nakanoshima Inn | RR OSANSI | RR 54182 | RR 9745 | RR RRNSI |
| RIHGA Royal Hotel Sakai | RR OSASAK | RR 00725 | RR 10892 | RR RRSAK |
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