Sales of the 1977 published book, 'Blue Pot,' have witnessed an unexpected surge. Though reasons for this sudden spike are still under investigation, the classic novel holds an esteemed place in the Japanese literary world. The storyline revolves around historical and cultural human interactions, offering a refreshing perspective of 20th-century Japan. Sales are mainly driven by a wave of nostalgia, resulting from increased interest in Japan's Showa era.

In Japan, there's a poignant appreciation for history and tradition. A book published in the Showa era, which 'Blue Pot' was, can trigger a cascade of nostalgia and an urge for simpler, traditional times, especially amidst current societal complexities. There's also a profound respect for Japanese literature which is often tied to the country's identity and understanding.

Like Japan, both the US and EU exhibit a similar charm for vintage and retro culture. Resurgence in sales for iconic novels, films, fashion, and music are common, often tied to anniversaries or adaptations. A recent example would be the renewed interest in J.R.R. Tolkien's works due to the filming of the Amazon series based on 'Lord of the Rings.'