Manga / Sengoku Komachi Kurou Tan

Yes, all that happened in the first book. Except the rice bale.

Shizuko Ayanokouji is an ordinary schoolgirl of the 21st century. She studied in an agricultural high school, and her grandfather was a skilled man who knows a wide variety of subjects. One ordinary day, she time-slipped into the distant past and almost got raped by bandits. Luckily, she was saved by none other than Oda Nobunaga. Trapped in a foreign yet familiar land, now Shizuko must survive and thrive using her modern agriculture knowledge to support Nobunaga in his conquest of Japan.

Sengoku Komachi Kurou Tan! (lit. 戦国小町苦労譚, The Hardships of a Warring States Era Beauty) is a Japanese manga series written by Kyouchikutou and illustrated by Hajime Sawada. The title has ran since 2017 in the Comic Earth Star magazine, and has been compiled into 12 volumes so far. Or 15 novels, if you prefer.

Compare Nobunaga no Chef, another manga with a similar premise.

Tropes:

• A-Cup Angst: Downplayed, but Shizuko does cackle maniacally when her chest starts to grow.
• Alternate History: As the series goes on, Shizuko's actions begin to affect the timeline.
• Artistic License – Biology:
  • The climate in Honshu (specifically Owari Province) would not have enabled the cultivation of sugarcane^note a predominantly tropical crop; as a rule of thumb, it will not grow well past 33° North/South except in unique climatic situations, at least not in the scale depicted in the book.
  • Domesticating the wolves takes virtually no effort beyond feeding them, not even requiring establishing dominance, breeding out aggressive traits, or training. The fact that the wolves were starving to death would have accelerated the process, however.
• Assassin Outclassin': While Nobunaga and Ashimitsu are discussing how to fight the alliance of the Azai, the Asakura and Tendai monks arrayed against them, the latter kills a nearby ninja before sharing his idea.
• Bamboo Technology: Shizuko tends to prefer bamboo for any tech she recreates, even having a flask made from the stuff.
• Beach Episode: A few onsen-centered episodes featuring a naked Nobunaga.
• The Blacksmith: Kinzo, the village blacksmith who managed to build various modern farming tools and a European crossbow from Shizuko's vague ideas.
• Cool Sword: Ashimitsu carries around a sword that Noh identified as Mikazuki Munechika, a legendary master-crafted sword smithed almost six hundred years ago^note over a thousand years old by the time of the modern era where Shizuko came from.
• Darker and Edgier: The Sengoku Era depicted in the comic is generally lighthearted, although the undercurrent of constant warfare and suffering is there. Shizuko's tactics in wartim usually hinged on attrition and forcing the subjugation of an enemy with the smallest death toll possible, until chapter 48, when Shizuko used less honorable tactics (False Flag Operation, using shrapnel weapons, hitting the supply train, poisoning the food supply, etc) to hold Usayama Castle against the Azai-Asakura army, who has an overwhelming numbers advantage against the Oda defenders.
• Furo Scene: Shizuko builds a bathhouse. Apparently the only people allowed to use it are Shizuko and high-ranking men of the Nobunaga clan (and Nouhime).
• Giving Radio to the Romans:
  • Modern agricultural techniques and purebred^note their good traits would be stable for a few generations forward seeds that Shizuko accidentally brought from the future has not existed (or widespread) yet. A rather unique case with sweet potato, which was introduced to Japan around that time period so Shizuko may or may not pioneered its cultivation.
  • She also introduced the European crossbow to Japan. Chinese crossbows definitely existed before and in this time period, but was never widespread in Japan (they skipped straight to matchlocks).
• Heroes Love Dogs: Shizuko befriended a stray wolf in her early days of managing the settlement Nobunaga entrusted to her. She nursed it back to health and named it Wittman, and it helped her hunt. It later brought its mate and, over the course of the story, the pair sired a brood that is loyal to Shizuko.
• Hidden Depths:
  • Nobunaga is every bit the frightening warlord he is purported to be. He is also forward-looking in matters unrelated to war, as evidenced by his immediate interest and sponsorship of Shizuko's ideas to reintroduce the family registry, to establish a technology town dedicated to civil crafts and is apparently the first conqueror of Kyoto in a while to be concerned the state of the city. Further, his enthusiasm for Shizuko's stories of modern Japan rivals that of his son, hanging on to her every word and apparently getting into a spirited discussion with her while drunk at a feast.
  • Keiji Maeda is irreverent when it comes to etiquette and apparently spends most of his time eating, sleeping and fooling around. That said, he's the only person to understand that Shizuko loves farming simply by looking at her face while she's working. He also manages his assignment in Kyoto with relative ease, to find skilled craftsmen in the city, simply by going around and drinking with people.
• Hot-Blooded: Nagayoshi Mori brings a great deal of youthful exuberance everywhere he goes. Exemplified when Shizuko assigns him as the head of a peacekeeping force in Kyoto where he loudly and vigorously executes his duties to the amazement and approval of the populace.
• Iconic Item: Tadakatsu Honda's Tonbo-giri is so distinctive that Shizuko recognizes it despite never having seen it before.
• Implacable Man: The Ikko-Ikki sohei with the Asakura army power through all of Shizuko's special weapons like the staff slings, capsaicin bombs and barbed arrows, continuing their charge towards the Oda ranks buoyed by their chanting.
• In Spite of a Nail:
  • Nagamasa remains loyal to Nobunaga but the Oda clan still has to fight the Azai together with the Asakura at the Anegawa River. This is due to Nagamasa's father, Hisamasa, stabbing him in the back and taking control.
  • Yoshinari Mori still dies in the defense of Usayama Castle. Rather than simply being overwhelmed by Azai-Asakura forces in a pitched battle, he is killed while defending Shizuko's flank. Subverted when it's revealed he did survive but was severely wounded and despite recovering is told he can't fight in a battlefield anymore.
• Lost Technology: Family registries. First implemented in Japan during the Taika Reforms, it fell out of use in the Heian Period and was only reintroduced in the Meiji Restoration Era.
• MacGuffin: Shizuko's modern book on weapons and her modern appliances (including a cell phone). They gripped the reader's attention the few times they surfaced but doesn't seem to affect the story so far.
• The Mole: Nobunaga and Yoshinari have a young handmaid named Aya assigned to Shizuko to learn of her secrets. Nobunaga's son, Nobutada, is later sent to her under an assumed name as a curious samurai boy to pick her brain for her martial knowledge; Nobutada would later out himself when he thought he was dying of fever (he got better with Shizuko's assistance).
• Mundane Luxury:
  • One of Shizuko's biggest gripe at first is the lack of abundant hot water to bathe. Wittman later found a hot spring that Shizuko turned into an onsen post-haste.
  • Shizuko doesn't quite grasp the value of some of what she cultivates. For example, she knows for a fact that shiitake mushrooms are rare, especially since they weren't cultivated until about the 19th century. However, she has no idea how coveted they are until Aya explains to her that she could literally buy a castle with the amount she's got.
• Ninja: A few pop up throughout the story doing spywork and assassinations, with one in particular being a notable historical figure: Katō Danzō. Instead of being entangled with the Uesugi and the Takeda, he works for Ashimitsu.
• Oblivious to Love: Shizuko does not get that Tadakatsu Honda is in love with her. He tries to make a romantic gesture using a cotton flower and gives a line about how he would like for them to cultivate it together, but she takes it literally and later makes futons (among other things) out of them.
• One-Steve Limit: Because Shizuko introduced herself as Shizuko Ayanokouji, Nobunaga contacted the remnants of said clan to ascertain her status within it. Predictably, there's no record of her in the clan archives.
• Praetorian Guard: Shizuko gets a few prominent people to serve as her umamawari (lit. horse guards): Keiji Maeda, Saizo Kani and Yoshinari's son Katsuzou (the future Nagayoshi Mori).
• Rank Up: As part of their plans to strengthen their ties with the emperor, Nobunaga and Sakihisa Konoe pass off Shizuko as the illegitimate daughter of Toshikazu Ayanokouji (leader of the above-mentioned clan who is both the last of his line and dead by that point in time) and sends gifts to the court in her name. This ploy is extremely successful as, not only does Shizuko get legitimized and bestowed a name ('Nihime'), she is also appointed a rank in the imperial court even higher than Motonari Mori (who himself attained a pretty high rank by donating funds for the emperor's coronation).
• Renaissance Man: Shizuko is extremely well-versed in agriculture and has some knowledge in other fields (like engineering and textiles) as well but, by her own admission, what she has in the latter is more broad than deep and she needs to rely on Kinzo and the many craftsmen sent to her to make her non-agricultural ideas work.
• The Reveal: The mysterious man with modern knowledge who is following Shizuko's exploits (and thus, the historical deviations she's causing) is revealed to be Shizuko's uncle. Later chapters reveal that he's Yoshiteru Ashikaga and that he's already time-traveled once before, to the modern-day from Hisahide Matsunaga's assassination attempt at Nijo Castle.
• Right Behind Me: Shizuko is an ace at triggering them.
  • After having a bathhouse built, Shizuko declares, "Nothing frightens me any longer!" Naturally, Nobunaga is standing behind her.
  • Shizuko is about to make Aya the first person in history to eat tempura. Naturally, Nobunaga and his wife Nouhime are standing behind her.
• Running Gag:
  • Nobunaga bopping Shizuko on the head nearly every other chapter for one reason or another.
  • Aya responding to anything new that Shizuko wants her to try with "Is that an order?"
• The Spymaster: Yoshinari Mori seemed to fill this role, at least as far as Shizuko is concerned.
• Stay in the Kitchen: The men of the village Shizuko is appointed to lead initially object to the idea of following a girl's orders but quickly change their tune when her methods bear fruit. Nobunaga's vassals also express their displeasure with her (whether it's making use of her ideas or bringing her to the battlefield) until Nobunaga gets angry at them over it.
• Statuesque Stunner: Shizuko stands like a sore thumb against the backdrop of Sengoku-era Japan, being taller than some men.
• Sweet Polly Oliver: Nobunaga has Shizuko dress as a man when they meet with the Portuguese missionary, Luis Frois.
• Through His Stomach: Tadakatsu first falls for Shizuko after she gives him some new onigiri samples while he's being detained for trespassing in her territory.
• Time Travel: The story begins with Shizuko got transported back to the Sengoku period, along with her uncle Ashimitsu, who somehow got separated from her during the trip. There's another man whose backpack was sold to Shizuko.
• Urban Legends: Shizuko starts lots of this due to the almost-magical success of her village. One rumor made her to be a broad-shouldered muscly woman that has wolves obeying her.
• What Did I Do Last Night?: Shizuko apparently did something audacious during a feast while drunk, including getting into a heated argument with Nobunaga. She has no recollection of it though and is only met with embarrassed looks and some advice to drink in moderation.
• Wretched Hive: Kyoto is apparently this following the Onin War. Every would-be conqueror to take the city often let their soldiers rape and pillage as they will, leading to a rise in banditry and vagrancy. Nobunaga is apparently the first warlord in recent history to be concerned with this and appoints Shizuko to restore public order.