So after a good deal of thought my selection is
Spring Snow by Yukio Mishima.
About the book:
The first novel of Mishima's landmark tetralogy,
The Sea of fertility
Spring Snow is set in Tokyo in 1912, when the hermetic world of the ancient aristocracy is being breached for the first time by outsiders -- rich provincial families unburdened by tradition, whose money and vitality make them formidable contenders for social and political power.
Among this rising new elite are the ambitious Matsugae, whose son has been raised in a family of the waning aristocracy, the elegant and attenuated Ayakura. Coming of age, he is caught up in the tensions between old and new -- fiercely loving and hating the exquisite, spirited Ayakura Satoko. He suffers in psychic paralysis until the shock of her engagement to a royal prince shows him the magnitude of his passion, and leads to a love affair that is as doomed as it was inevitable.
About Mishima:
Yukio Mishima was the pen name of Kimitake Hiraoka (January 14, 1925 – November 25, 1970), a Japanese author, poet, playwright, actor and film director, also remembered for his ritual suicide by seppuku after a failed coup d'état. Nominated three times for the Nobel Prize in Literature, Mishima was internationally famous and is considered one of the most important Japanese authors of the 20th century, whose avant-garde work displayed a blending of modern and traditional aesthetics that broke cultural boundaries, with a focus on sexuality, death, and political change.
As the book description indicates this is the first in a tetralogy. Book one does stand alone, but it is worth reading all four, if you like the first.

It apparently is available as an ebook, just not in the United States.
Inkmesh search.