
写真は1957-8年当時と推定される、札幌市中央区北3条西11丁目の幹線道路「石山通」の様子。
白黒画像だったものをわたしのMacで「カラー化」させた写真であります。カラー化にはリアルタイム感の復元効果があると個人的には思います。で、このようにしてみて、この土地で3歳から15歳くらいまで成長した人間としては、深く「時代相」を実感させられている。
わたしの年代からもう少し上の世代、ベビーブーム世代という「人口急増」時代の極限的な社会状況だったのだと、いまは深く実感させられるのですね。この石山通は札幌でも有数の超幹線道路で、石切山と言われた石山軟石採取地から建設需要旺盛な札幌市街地域に資材を運搬させる明治初期からのメイン道路。
その石山通すら、舗装されていなかった時代なのですね。明治期からは馬による輸送が中心で、その馬の糞〜馬糞が乾燥して「馬糞風」という独特の「風情」が印象的に語られていたほど。
こういう時代は、戦後の人口急増によってそれこそ「生めよ、増やせよ」という時代状況であり、需要が完全に生産活動を大きく上回っていた時代相。まさに「つくれば売れる」という押せ押せの社会。
まったく現代の人口減少社会とは違う社会だったことが、空気感から伝わってくる・・・。

これはわが家業の商用車の後ろ姿。
モータリゼーションの急速な盛り上がりのなかで、それを商品配送に有効活用すること「だけ」でも、同業他社との差別化になり、それで企業成長につながっていくという「夢のような」時代だった。イマドキから考えたら、え、その程度の差別化で成長が可能だったのかと不思議に思えるほど。
日本社会で人口急増によるマーケットの自然拡大があらゆる商圏で盛り上がっていった。そしてこの企業成長を担った世代は、戦争による世代人口の極小化もあって、競争もまた極小だったのだと言える。
・・・こういう時代は完全に「おわった」時代なのだろう。
いまのわれわれ世代は、そういった残滓がまだ考え方の基底にあって勘違いを生んだりする。
一方で、日本社会は徐々に人口停滞から減少する可能性の高い社会に変容してきている。こういう社会の中で、どのような「生存戦略」が必要なのか。ほぼ同様と思えるアメリカ社会からは、ちょっと前のパソコン革命、そしていまのAI革命などの「革新」が次々と世に現れてくる。さて、あしたはどっちだ?
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English version⬇
[What Does the Transition from a Society of Population Growth to One of Aging and Population Decline Look Like?]
If our mindset remains fixated on the postwar era’s assumption that “if you build it, they will come,” we will be ill-equipped to adapt to the society of the future. …
This photo shows Ishiyama-dori, a major thoroughfare in Kita 3-jo Nishi 11-chome, Chuo-ku, Sapporo, and is estimated to date from around 1957–1958.
It is a black-and-white image that I have “colorized” using my Mac. Personally, I believe colorization has the effect of restoring a sense of the time period. Seeing it this way, as someone who grew up in this area from the age of three to about fifteen, I am deeply struck by the “spirit of the times.”
It really drives home to me now just how extreme the social conditions were during that era of “rapid population growth”—the Baby Boom generation, which is a bit older than my own. Ishiyama-dori is one of Sapporo’s major thoroughfares; since the early Meiji period, it has served as the main route for transporting construction materials from the Ishiyama soft stone quarry—known as Ishikiri-yama—to the city center, where demand for building materials was high.
It was a time when even Ishiyama-dori wasn’t paved. From the Meiji period onward, horse-drawn transport was the primary method, and the horse manure—once dried—was so distinctive that it was described as having a unique “charm” known as “horse manure-like.”
This was an era marked by the postwar population boom—a time when the slogan “Be fruitful and multiply” truly applied, and demand far outstripped production capacity. It was a society driven by the mindset that “if you make it, it will sell.”
The atmosphere conveys just how different this society was from today’s population-declining society…

This is the rear view of a commercial vehicle from my family business.
Amid the rapid rise of motorization, it was a “dream-like” era where simply making effective use of it for product delivery was enough to differentiate us from competitors and lead to corporate growth. Looking back from today’s perspective, it’s almost hard to believe that growth was possible with such a minimal level of differentiation.
In Japanese society, the natural expansion of the market driven by rapid population growth was booming across every commercial district. And the generation that drove this corporate growth faced minimal competition, partly due to the war-induced drastic reduction in the size of their generation.
…I suppose that era is completely “over” now.
Our generation today still has remnants of that mindset at the core of our thinking, which sometimes leads to misunderstandings.
On the other hand, Japanese society is gradually transforming from one of population stagnation to one with a high probability of decline. What kind of “survival strategy” is necessary in such a society? In American society, which seems almost identical, “innovations” such as the recent PC revolution and the current AI revolution have been emerging one after another. So, which way will tomorrow go?
● Announcement
My book, “Writers and Living Spaces,” has been published as an e-book by Gentosha.
Available on Amazon.
Posted on 5月 6th, 2026 by 三木 奎吾
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