IATA数据库上的韩国过境免签条件里没有了日本签

持有日本个人旅游签证，拟先飞韩国停留4天后再飞日本，没办韩签，打算在仁川机场申请过境免签。
上个月查询IATA数据库，里面还清楚列明持有日本个签可在韩国过境免签停留30天。
今天再查询，发现visa exemptions里没有了日本，多了瑞士。
Visa Exemptions
Nationals of China (People's Rep.) with a visa issued by Australia, Canada, New Zealand, Switzerland, USA or an EEA Member State if in transit through Korea (Rep.):
- holding confirmed onward tickets on flights departing within 30 days; when
- arriving from a third country, departing to the country that issued the visa (e.g. PVG-ICN-SFO); or
- arriving on a direct flight from the country that issued the visa (a visa that expired on departure from that country is accepted), departing to a third country (e.g. SFO-ICN-PVG).
Not applicable if traveling in a group.
Not applicable if traveling from/to Northern Mariana Isl.
Not applicable to holders of an e-visa.
难道最近韩国过境免签政策调整了吗？但韩国驻华使馆网页上的《中国公民免签入韩介绍》里还有持有日签可以免签的说明。
有了解情况的大神吗？望解答。多谢！