Only after I became a married man had it truly dawned on me that I was an inhabitant of earth, the third planet of the solar system. I lived on the earth, the earth revolved around the sun, and around the earth revolved the moon. Like it or not, this would continue for eternity (or what could be called eternity in comparison with my lifetime). What induced me to see things this way was the absolute precision of my wife’s twenty-nine-day menstrual cycle. It corresponded perfectly with the waxing and waning of the moon. And her periods were always difficult. She would become unstable- even depressed-for some days before they began. So her cycle became my cycle. I had to be careful not to cause any unnecessary trouble at the wrong time of the month. Before we were married, I hardly noticed the phases of the moon. I might happen to catch sight of the moon in the sky, but its shape at any given time was of no concern to me. Now the shape of the moon was something I always carried around in my head.
I had been with a number of women before Kumiko, and of course each had had her own period. Some were difficult, some were easy, some were finished in three days, others took over a week, some were regular, others could be ten days late and scare the hell out of me; some women had bad moods, others were hardly affected. Until I married Kumiko, though, I had never lived with a woman. Until then, the cycles of nature meant the changing of the seasons. In winter I’d get my coat out, in summer it was time for sandals. With marriage I took on not only a cohabitant but a new concept of cyclicity: the phases of the moon. Only once had she missed her cycle for some months, during which time she had been pregnant.
