I did a search of the land registry.

Wellington and Manawatu Railway Company owns a 1.4ha block in the mountains east south east of Otaki. Wellington and Manawatu Railway Company Limited, removed from the company registry in 2014, owns a 10,000ha block east of Otaki, but that is listed as part cancelled and a lot of that land has been transferred to other owners. Both blocks a long strips of land that you might expect to adjoin railway lines.