Adding one new airport to the list. Istanbul Sabiha Göcken (SAW)

Business class, OWE, and OWS have access to the LGM International lounge. Up the escalator where the entrance to the Turkish Airlines lounge is located as well. No showers, toilets are outside the lounge. The lounge is not very big, The food is a bit limited, but the soup, bread, and the Turkish sweets were quite nice.

A bit of extra information in Tokyo.

Both Haneda and Narita departures use the Japan Airlines lounges. Business class and OWS will have access to the business class lounge, OWE will have access to the JL first class lounge.