Over six days in late November, I submerged myself in Tokyo's ramen culture, eating roughly four bowls a day at shops both fancy and spartan, modern and ganko, trying to suss out not just what makes a good bowl but also the intricacies of ordering and eating well. Above all, I wanted to know why such a simple concoction -- brought from China by Confucian missionaries in the 17th century -- inspired so much passion and devotion among Japanese and foreigners alike, and to thereby gain some deeper understanding of Tokyo itself.