The Kamogawa Food Detectives (kamogawa Food Detectives, #1)

Told through six interconnected stories, the novel follows a father-daughter pair who run a peculiar establishment in Kyoto: part restaurant, part detective agency, dedicated to helping clients rediscover dishes from their past. The Kamogawa Diner sits on Shomen-dori near Higashi Honganji temple, with no sign. Clients typically find it through a cryptic advertisement in Gourmet Monthly magazine. Nagare Kamogawa, a former police detective turned gifted chef, runs the kitchen, while his daughter Koishi Kamogawa manages the detective side, interviewing clients in a small back office. Nagare's wife, Kikuko, died about five years earlier, and her portrait watches over the family from a Buddhist altar in the tatami-matted living room beside the kitchen.

In the first story, Hideji Kuboyama, a retired police detective and Nagare's former colleague, arrives seeking the nabeyaki-udon (vegetables and chicken simmered with udon noodles) his late wife Chieko used to make. He plans to remarry and move to Gunma prefecture with Nami Sugiyama, a younger colleague, but Nami's cooking never matches Chieko's version, and Hideji wants to taste it one last time. Two weeks later, Nagare recreates the dish, having traced Chieko's shopping habits by visiting Hideji's old neighborhood. He discovers that her pre-shopping chant, "masu, suzu, fuji," referred to the names of the shops where she bought ingredients. Nagare also uncovers that Chieko hid yuzu (a fragrant Japanese citrus) peel at the bottom of the pot, knowing Hideji would reject visible peel on his noodles. After Hideji confirms the flavor but notices the broth tastes slightly saltier than he remembers, Nagare reveals his final trick to Koishi: He added instant dashi (Japanese soup stock) powder, subtly shifting Hideji's taste memory so the difference between Chieko's refined stock and Nami's simpler version will feel smaller over time.

The second story brings Nobuko Nadaya, a quiet elderly woman escorted by her sharp-tongued friend Tae Kurusu, a regular at the diner. Nobuko seeks a beef stew she ate only once, over 55 years earlier. Her memory is fragmentary because of a shock during the meal: A young man she had corresponded with about classical Japanese literature suddenly proposed marriage, and she fled without answering, never seeing him again. Her family forced her to destroy his letters, and she cannot recall his full name, only that it began with the character for "mouse." Her daughter recently received a proposal, stirring Nobuko's own buried memories. Nagare retraces the couple's day, deducing from their discussion of The Ten Foot Square Hut and the mouse-zodiac clue that they visited Shimogamo Shrine, which uniquely assigns sub-shrines to each zodiac animal. He identifies the man as Shigeru Nejima and learns through Nejima's daughter that Nejima left for England shortly afterward, became a professor, married, and died the previous December. Nagare gives Nobuko an envelope from Nejima's daughter containing two handkerchiefs: one Nobuko left in the restaurant and one of Swatow embroidered lace that Nejima intended to give her. After Nobuko leaves, Koishi notices the envelope bears the sender's name: Nobuko. Nejima named his daughter after the woman he never forgot.

In the third story, Tomomi Iwakura, a bespectacled 58-year-old who gives the false name "Taro Yamada," arrives by taxi, trailed by a black luxury sedan. He requests the mackerel sushi he ate as a child, served by the kind owner of a ryokan (a traditional Japanese inn) near his emotionally cold family home in Kyoto. He remembers yellow rice, an acidic flavor, the "Ryukyu Islands," and a "living torii gate," a torii being a traditional shrine gate. Nagare traces the ryokan owner to the Tosa region of Shikoku, where the "living torii gate" turns out to be a pair of cedar trees grown together at a local shrine. The yellow rice comes from the Tosa tradition of seasoning sushi rice with yuzu, and "Ryukyu" refers not to the Okinawan islands but to a local dialect word for a species of taro layered into the sushi. As Tomomi departs toward the sedan, Nagare calls after him with an earnest plea and tells Koishi the sushi might have changed the future of the country, hinting Tomomi is a political figure of importance.

The fourth story centers on Suyako Hirose, a piano teacher from Yamaguchi prefecture seeking the tonkatsu (a breaded deep-fried pork cutlet) from Katsuden, a restaurant her ex-husband, Denjiro Okae, once ran. Though Suyako dislikes greasy food, she wants the dish recreated for Denjiro, who is gravely ill. Their marriage ended after Suyako's cousin died of fugu (pufferfish) poisoning at Denjiro's former restaurant. Fugu can be lethally toxic, and though Denjiro was absent, he felt responsible. Nagare discovers that Denjiro opened a tonkatsu restaurant because Suyako once praised his tonkatsu, a compliment she does not remember making. He recreates the dish with three sauces made from Yamaguchi bitter oranges and explains that Denjiro's nighttime mumbling of "five mil, three mil" referred to his debate about ideal breadcrumb size: five millimeters for crunch or three for the softer texture Suyako preferred. After Suyako leaves with the recipe and ingredients, Nagare tells Koishi he believes Denjiro has already died. Clues in a hospital photograph, frying-oil burns on Suyako's fingers, and Drowsy the diner cat's attention to her oil-scented clothes all suggest Suyako wanted to share one last meal with Denjiro's memory.

The fifth story follows Asuka Mizuki, a 19-year-old university student from Hamamatsu seeking the Napolitan spaghetti, a Japanese-style ketchup-and-frankfurter pasta, she ate on a childhood trip with her grandfather Chichiro Mizuki. Chichiro raised Asuka while her parents worked and now has dementia, no longer recognizing her. Her memories are scattered: a hotel by the sea, bright lights, yellow-and-red spaghetti on a sizzling plate, and burning her mouth. Nagare reconstructs the itinerary, deducing they stayed on the Atsumi peninsula, where the bright lights came from denshogiku farms, greenhouses where chrysanthemums are grown under lights all night. The spaghetti was from a restaurant called Chef in Nagoya, which served Nagoya-style "Italian," a regional dish of spaghetti placed atop whisked egg on a sizzling iron plate. Nagare provides Asuka with ingredients and a griddle so she can cook for her grandfather, reflecting that the trip was likely the first time Chichiro treated her as an individual by ordering her own meal.

The final story introduces Hisahiko Tsuda, a brash 33-year-old CEO seeking the nikujaga (a Japanese meat-and-potato stew) his biological mother Kimie made before she died of illness when he was five. He resents his stepmother Sachiko, Kimie's former hospital carer, who married his father less than a year after Kimie's death. A childhood incident in which he found two pots of stew, one with better meat for Sachiko and her daughter Miho, convinced him he was treated as an outsider. When Nagare serves the nikujaga, Hisahiko identifies it as Sachiko's cooking and starts to leave. Nagare asks him to sit and explains: The two stews are identical. During her illness, Kimie compiled a recipe notebook for Hisahiko and gave it to Sachiko, asking her to marry his father and raise the boy. The meat was not premium beef but yamato-ni, a canned soy-stewed beef, reliably lean because young Hisahiko disliked fat. The "mountain" association came from the character for mountain in the word yamato-ni. The reddish color came from Kimie mashing carrots for a child who disliked them; Sachiko chopped them normally once he outgrew the aversion. The two pots existed because the canned meat would toughen if simmered too long, so Sachiko added it only at serving time. Sachiko keeps a scrapbook of Hisahiko's press clippings and has saved every yen he sent her. Hisahiko asks to take his mother's notebook and the cans of meat, clutching them to his chest, and stops to stroke Drowsy on his way out, a gesture of tenderness absent from his first visit.

The novel closes with Nagare and Koishi planning a nighttime cherry blossom picnic. Koishi retrieves Kikuko's pale pink stole, dyed with cherry blossom, a garment they once lost on a train and recovered, causing Kikuko to cry twice. Holding the stole, Koishi says through tears that one mother is plenty for her. Nagare smiles and tells her she grows more like Kikuko every day.