On page 675, the three sisters are discussing how and why Peter Jansen would have bought the properties and allowed the families to live on the land for so long. Fuyue claims it all makes no sense. "A company's main motive is profit making, isn't it?"
Harue and Natsue respond with a bit about Taisho Romanticism:
"You can't imagine what it was like," [Natsue says,] "when there was some Taisho romanticism in the air, before the country became so militaristic."
"Taisho romanticism would mean nothing to a Westerner," [Fuyue responds.] "They wouldn't even know what the Taisho period is."
"Oh, you just don't know. Westerners too were much more romantic back then."
It's a complicated point that takes into account Japan's history in the early part of the twentieth century.
The Taisho period is named for Emporer Taisho, a sickly, weak man who held the imperial seat from 1912 until his death at the end of 1926. Because he was physically unable to handle much work, the reins of power slowly slipped out of his and the oligarchs' hands, coming more and more to rest in the Diet, the Japanese legislature. The preceding period (the Meiji Period) and the following period (the Showa Period) were marked by an aggressive militarism. By contrast, the Taisho period was one of relative calm.
The sisters' claim that the West was somehow "more romantic back then" is patently absurd. The West was in the middle of World War I. True, Japan sided with the allies and so won some unprecedented peace on the international front during those years. But the Russian and Chinese revolutions roiled Japan and its foreign policy, leading directly to the warmongering that culiminated in World War II.
And yes, Japan was sliding more toward a modern democracy as control fell away to the Diet.
But the famed romanticism of that period is mostly seen as a constructed ruse, a palliative, a flimsy illusion. Inflation was at run-away levels. Westerners were moving into Japan, even buying up vast tracks of land in unforeseen numbers. The national debt soared. Student unrest--particularly communists, seen as another "Western" influence--was at an all-time high.
Nevertheless, the Japanese even today have a hankering for the period. Entire festivals still feature young women parading down the street in Taisho fabrics. They look back in fondness on Taisho schoolgirls, so innocent and young. On Taisho geishas, the height of their craft. On Taisho architecture, so delicate and spare.
Those buildings weren't made to last. And they didn't. In 1923, the 7.9 Kando earthquake, centered just off the coast near Tokyo, devastated the countryside, destorying ports and entire towns, killing over 140,000, and causing unsanitary conditions that allowed a typhoid epidemic to kill tens of thousands more. Japan could be said to have never recovered from the earthquake--until late in the 1930s.
And by then, of course, it was too late. That vaunted Taisho romanticism is partly what allowed Hirohito to rise to new heights of power.