|Japanese name:|| 遠山 和葉|
|English name:||Kirsten Thomas|
|Date of birth:||Unknown|
|Relatives:|| Ginshiro Toyama (father)|
|Occupation:||High School Student|
|First appearance:|| Manga: File 185|
Anime: Episode 118
|Appearances:|| Chapters: 122|
|Keyhole number:||Volume 19|
|Japanese voice:||Yuko Miyamura|
|English voice:||Gwendolyn Lau|
|Drama actor:||Rei Okamoto|
Kazuha Toyama (遠山 和葉 Tōyama Kazuha), also known as Kirsten Thomas in the Funimation dub, is character in the manga and anime Detective Conan. She is a childhood friend and the romantic interest of Heiji Hattori.
Kazuha and Heiji Hattori have been close friends since childhood. Their fathers work together at the Osaka Police station, where Kazuha's father, Ginshiro Toyama is a subordinate and close friend of Heiji's father, Police Chief Heizo Hattori. Her mother is mentioned in episode 573, where she wanted Heiji to bring Kazuha her drinkbottle.
At one time in their youth, Heiji had had the unfortunate idea of locking themselves together with a set of old handcuffs which had no key to unlock it; as a result they involuntarily had to spend time together even on some rather intimate occasions (i.e., bathroom visits) before the cuffs could be removed. As a reminder of this 'closeness' and for good luck, Kazuha fashioned two identical lucky charms, each incorporating a chain link from the cuffs, which she and Heiji have been wearing ever since. At some later point, Kazuha added a picture of Heiji into her own charm pouch.
After Heiji had met Conan and discovered his true identity, he talked about him so frequently and enthusiastically to Kazuha that she became convinced that Heiji was in love with a Tokyo girl named 'Kudo.' When Heiji invited Conan, Ran and Kogoro to Osaka, Kazuha spied on them, believing Ran to be 'Kudo.' At an okonomiyaki restaurant, when Heiji got up for a moment, Kazuha sat down in his seat and warned Ran to back off him, at which point Heiji returned, the misunderstanding was cleared up, and Heiji laughed at Kazuha's behavior. In their next meeting, Kazuha continued to treat Ran coldly, pointing out that Ran and Heiji's clothes had coincidentally matched the last few times they had been together. In response, Ran immediately changed clothes, after which point the girls became much friendlier. 
Kazuha has a hot temper and can be highly critical of people around her. She has been hinted to have a high level of intelligence, as she was able to deduce a dying message in an episode even more quickly than either Ran or Kogoro could (albeit with slight help from Heiji). Moreover, she is highly confrontational and unafraid to let others know of her dislike. This trait leads to frequent shouting matches with Heiji, but it also allowed her and Ran to forge a strong friendship despite the fact that Kazuha, believing that Ran was Heiji's new girlfriend, took an initial deep dislike to Ran out of jealousy. Affection and approval are apparently much harder for her to express, most significantly with regard to Heiji; she is perfectly aware of her feelings for him and, after a few initial attempts to deny it to Ran, openly discusses her love for Heiji with her. However, even when a good opening appears to discuss her feelings with him, she instead panics and does her best to pretend that she and Heiji are 'only friends.'But twice already has she tried and failed to confess to Heiji, but Kazuha is determined to make her feelings clear to him one day.
She also has a marked belief in spirits, good-luck charms, and other superstitions. Right from her first experience, she displayed her belief in the importance of hers and Heiji's omamori, charms which Kazuha made to protect her and Heiji from harm. And indeed, during the same case, Heiji lent Conan his omamori, and the metal inside the charm stopped a knife blade that would have killed Conan. On subsequent cases, Kazuha is quick to attribute mysterious shadows and strange events to ghosts and other malignant spirits, which usually sends Ran into a panic as well, though she herself does not possess a morbid fear of ghosts as much as Ran does.
Kazuha has dark brown hair which she keeps up as a neck-length pony tail, and often uses ribbons of different colors (mostly yellow or orange) to secure her hair. She also has green eyes, fair skin, and a fairly slim and curvaceous build, not unlike Ran herself. Kazuha's way of dressing ranges from shirt and jeans to (though rarely) dresses.
Despite her fearfulness, Kazuha is also a 2-dan in aikido, and has exhibited her skills in taking down several criminals, including Ki'ichiro Numabuchi. Kazuha also seems to be more intelligent than Ran, as shown in Episode Which One's Deduction Show when Heiji gave a clue about the code which Kazuha understood while Ran couldn't.
 Plot overview
Soon after Heiji made Conan/Shinichi's acquaintance, he invited Kogoro, Ran and Conan to Osaka. Several times throughout the day Ran felt herself being watched by a pair of malevolent eyes. At lunchtime that day, a girl sat down and, to Conan's horror and Ran's bafflement, addressed Ran as "Kudo." She warned "Kudo" to stay away from Heiji, who soon returned and sets her right. Heiji introduced her as his childhood friend Kazuha and introduced Ran as Kudo's girlfriend- which Ran hotly denied -, whereupon Ran asked them if they are together, which Kazuha and Heiji hotly denied in turn.
 Subsequent appearances Later, in the Mermaid Island case, Heiji nearly fell off a cliff during his investigation. Kazuha saved him, but overbalanced and fell off the cliff herself. Heiji jumped after her, managing to grab her wrist with his left hand and a jutting branch with his right. However, the branch began to bend, so Kazuha stabbed Heiji's hand in an attempt to make him let her go and save himself. Despite the wound, Heiji did not let go, and managed to save the both of them. He still bears the scar on his left hand, and has been known to mock Kazuha about it.
In a later case, Heiji and Kazuha were kidnapped by a corrupt lawyer in an attempt to force Heiji to crack a code. When he wouldn't comply, the lawyer decided to kill them both. Heiji asked to be allowed to say a few last words to Kazuha, claiming he had to tell her something he had wanted to say for a long time. This, it turned out, was a ploy to distract the lawyer, but when it failed, Heiji, with a gun to his head, told Kazuha that "I meant it when I said my last words were for you" and promised, if they survived, to tell them to her "until you're sick of hearing it." Afterward, when she asked him what he was going to say, he panicked and insisted that he had wanted to tell her that her ponytail had been tickling him while they were handcuffed together - which earned him an enraged slap in the face.
 Relationships analysis
 Family & Friends
 Heiji Hattori
Heiji's relationship with Kazuha is a very close one; they were childhood friends, and have stayed close through the years. Their relationship is identified as a romantic one by other characters and fans alike, even though they claim that they don't have that sort of relationship or feelings for each other. Heiji is clueless when it comes to love and has not yet realized he has actual feelings for Kazuha. However, it has been shown that he becomes visibly jealous when he sees Kazuha with other guys, becoming distracted throughout the whole case. At one point, after a certain case, while looking at Kazuha, his thoughts read: 'Fool. You're too naive. I promise you, as long as you're with me, I'll never let anyone hurt you.'. Kazuha knows she has feelings for Heiji, as she shows this by being protective and chasing off other women that might have a interest in him In on of the mangas Kazuha attempts to confess her feelings after finding out that Ran had done so with Shinichi, but is unlucky because by telling him, Heiji ran off to tease Shinichi for it. She one time even attempted to sacrifice herself to save Heiji during a case that they accidently both fell off a cliff, and when they were both hanging on the branch Heiji was holding was breaking so to prevent him falling she stabbed him hand with an arrow of love to force him to let her fall, however he still held on despite a wounded and bloody hand. Also, they have the same situation as Ran and Shinichi, being childhood friends that have romantic feelings for each other and have the same background as them. Heiji is a teenage detective and she is a police's daughter, like Ran is a police's daughter and Shinichi is a teenage detective. They are even called the 'Ran and Shinichi of Osaka' by fans of the series, since they're so similar. Although they are constantly fighting, they both are very close friends. It is also shown in the seventh movie, Crossroad in the Ancient Capital, that Kazuha is Heiji's first love, though he didn't know it was her at the time.
 Ran Mouri
Despite having rather different temperaments and personalities, Kazuha and Ran have several things in common, including: proficiency in a martial art, father's connection to police work and detective work, and detective-obsessed childhood love interests. Kazuha was initially cold and rude to Ran, suspecting her of being interested in Heiji. However, thanks to Kazuha's frankness and Ran's accommodating nature, the girls quickly overcame this misunderstanding. They have since become close friends and seem to regard each other as confidantes, since they are in similar romantic situations: Ran and Shinichi cannot confess their feelings for each other, as Shinichi is, aside from telephone calls, physically absent from her life, and Kazuha and Heiji cannot confess their feelings for each other due to their own stubbornness and irascibility. While Conan/Shinichi and Heiji are on cases together, Ran and Kazuha almost always spend the time together. When Kazuha visits the Mouris' in Tokyo with Heiji, she is shown to share Ran's bed.
 Shinichi Kudo
Kazuha respects Shinichi as a great detective as Heiji. Sometimes she refers Shinichi as better detective than Heiji, which annoys Heiji.
 Character popularity
- eBookJapan held a character popularity poll from April 12, 2011 to May 12, 2011 in which readers of Detective Conan (international included) could vote for their favorite character. Kazuha placed 16th in the poll with 40 votes out of the 5,883 that were cast.
- In honor of the release of the 15th movie, Quarter of Silence, the official Conan movie website held a popularity poll for the top 10 Detective Conan characters. Kazuha placed 7th out of 10.
- In honor of the release of the 800th manga chapter, Shonen Sunday held a popularity poll/contest containing 91 Detective Conan characters to choose from. Kazuha placed 11th overall with 203 votes.
 Name origin
 Different looks
 In other languages
- The kanji for Kazuha's first name mean 'Japanese Leaf.' Her last name, Toyama, means 'distant mountain.'
- Besides Eri Kisaki, Kazuha almost always keeps her hair in a ponytail.
 See also
- ^ a b Conan Drill page 57
- ^ Volume 66, File 693: "The Charm Recovery Operation!", Page 4 - Kazuha's mother is mentioned for the first time.
- ^ Manga Volume 19: File 185 (Stabbed Wallet Case)
- ^ Manga Chapters 693-695: Kazuha's Charm Case
- ^ a b c d Manga Volume 19: Chapters 5-8(Stabbed Wallet Case)
- ^ Manga Volume 21: File 211 (Wedding Murder Case)
- ^ Manga Volume 25: Chapters 4-8 (Spider Mansion Case)
- ^ Manga Volume 28: Chapters 6-10
- ^ Manga Volume 31: Chapters 8-10
- ^ Manga Volume 38: Chapters 8-10
- ^ "『名探偵コナン』 人気投票結". eBookJapan. 2011-05-12. http://www.ebookjapan.jp/ebj/special/conan/vote_kekka2.asp. Retrieved on 2011-05-15.
- ^ "名探偵コナン「キャラクター人気投票」". www.conan-movie.jp. 2011. http://www.conan-movie.jp/camp_chara/camp15th_res.html. Retrieved on 2011-08-12.
- ^ "Shonen magazine detective conan official poll results published [magazine pic"]. eva. 2012-02-28. http://forum.dctp.ws/index.php?topic=8024.msg651566#msg651566. Retrieved on 2012-02-29.