Jan 15 (Reuters) - Hong Kong's Miramar Hotel and Investment Co 0071.HK said on Wednesday its unit would buy an affiliate of Henderson Land Development 0012.HK, including debt, for HK$3.12 billion ($400.74 million).
($1 = 7.7856 Hong Kong dollars)
(Reporting by Sherin Sunny in Bengaluru; Editing by Shreya Biswas)
((Sherin.Sunny@thomsonreuters.com;))