Author's Note: This is the first chapter of a joint fic I am doing with The Crimson Ninja. Along with it being a joint fic it is also a Danny Phantom/Yu Yu Hakusho crossover! Now this relates to the title "Han Rei" which is Japanese and means "Half Ghost" so if any of you know the DP universe will get the story behind that…though YYH fans will understand the 'rei' part as it is also a theme in YYH. These stories fit so well together that Crimson Ninja and I decided it would be cool to bring them together in a new fic! So for your reading pleasure we present to you "Han Rei!"

Han Rei

By Crimson Ninja and SiriusAboutMarauders

A Danny Phantom/Yu Yu Hakusho Crossover

((Amity National Airport, Amity))

Danny couldn't believe his luck, he was ACTULLY going to Japan as a foreign exchange student. What was even better was that Tucker had gotten accepted as well. True they wouldn't be living in the same house but it seems they would both go to the same school, Sarayashiki Jr. High. Danny had also found out he would have to wear a uniform but he was okay because he was going to Japan.

"Now Danny are you sure you have everything," Mattie Fenton asked. Danny smiled; he would miss seeing his mom worrying about him everyday. Well at least he wouldn't have her yelling at him for being late because of certain things he had to do.

"Yeah I think I've got everything," he said with a smile.

Jack Fenton, Danny's very large father stepped forward, he pulled Danny aside, "Now Danny…I understand that Japan is home to some ancient ghosts. I want you to take this with you…use it well," Jack said shoving a large black gym bag into Danny's arms.

Danny laughed uneasily, "Uhm…Dad how am I supposed to get this through customs?"

Jack patted Danny on the back, "Its all taken care of son…it's all taken care of. Now I've got the restof theFenton spectral catching equipment in the car so-"

"Dad! I think I saw a, uhm, eh, Gremlin! Yeah, a Gremlin on the side of the wing of that airplane!"Jaz, Danny's genius and skeptical sister,cried pointing to an airplane parked nearby a window.

Jack spun around, "I knew Gremlins were stalking the airport!" He pulled out two large cans of unlabled spray, "Good thing I have my Fenton Gremlin Spray!" Jack took off running through the terminal leading to the aforementioned plane.

A flight attendant standing nearby sighs, "Oh great, call security. That weirdo who blew up the vending machine because he thought it was haunted is back" An officer standing nearby heard her and pulled out his walkie-talkie, "On it."

"Attention passengers, we are now boarding Flight-242 Amity to San Francisco, all passengers report to Gate 14," the intercom called.

"Uhm...bye mom...bye Jaz. And thanks for that."

Jaz winked at him, "No problem. I wouldn't want people abroad to think our family is crazy."

"Now you stay in touch Danny," Mattie said with tears in her eyes, "I better go get your father before he decides to start a riot again..."

Jaz laughed uneasily, "Be good Danny."

Danny nodded, "I will," he turned to leave and ran straight into the back of Dash Baxter, star quarterback of Casper High's football team. Dash turned around, "Well, well if it isn't Fentino," Dash said, his fists balling up.

Danny gulped, "Uhm…hey Dash…what are…what are you doing here?"

Dash smirked, "I got a scholarship to play football over in Japan. Not that it's any of your business Fenton," Dash said pushing Danny to the ground and then walking away, lifting his suitcases easily and heading towards gate 14."

"Need help Danny?"

Danny looked up to find Tucker Foley standing over him. Danny grabbed Tucker's hand and pulled himself up, "Thanks."

"Well it seems we can't get rid of Dash so easily, hope he isn't going to Sarayasheke Jr. High," Tucker said.

"I think you pronounced it wrong Tuck."

"Last call for passengers boarding Flight-242."

"Crap! Come on Tucker we have to go," Danny shouted and slinging the tote bag over his shoulder started running to gate 14. As Danny boarded the plane he could see his mother and sister waving goodbye and his dad being carried off by security.

Outside the window a ghostly vulture watched Danny run towards the gate. It then turned and flew off.

((Master's Manor, Wisconsin))

Vlad Masters leaned back in his tall back leather chair. He looked up as a giant green vulture flew in. "He's leaving boss…heading to Japan," the vulture said.

Vlad smiled; with Danny gone the city would be virtually unprotected. However another part of Vlad was disappointed. He liked to keep tabs on the boy…he would need to get someone over to Japan to make sure the boy stayed occupied.

Suddenly it occurred to him, he should send his newly appointed apprentice, "Valerie," he said standing up, "It looks like you'll be going to Japan as well."

Luckily Vlad's "company" had a branch in Japan. Vlad started to type up a letter…a letter that would send Valerie and her father to Japan and would have all expenses paid. 'You think you can escape me Danny…you have another think coming.'

((Tokyo, Japan))

Yusuke walked the streets of Tokyo, it was really late at night but Yusuke couldn't sleep. More like…he wasn't allowed, Botan had woken him up a few hours earlier with a small mission. Of course he had complained, it was eleven o'clock at night. He should be in bed, awaiting the arrival of that foreign exchange student from America. 'Hope the guy doesn't expect to make friends…I've got a busy schedule here,' Yusuke thought to himself.

"You're out late Detective," a familiar voice said.

Yusuke turned to see Hiei step out of an alley, "Well, well if it isn't Hiei. What are you doing in this part of town? Shouldn't you be reclining in a tree somewhere," Yusuke quipped.

"Very amusing, detective how long have you been planning that one?"

"I'm not in the mood Hiei; the brat leader assigned me a small case before my new house guest arrives."

Hiei raised an eyebrow, "House guest?"

"Yeah for some reason the school thinks assigning me a foreign exchange student to watch well bring up my grades or my attendance. Keiko thinks it will be good for me too so who am I to argue…I'll just ditch him like I do everyone else."

Hiei rolled his eyes and continued to walk with Yusuke. After a few blocks he stopped, "We've got company detective."

Suddenly from the nearby alley a hoard of ghostly looking ninja's emerged. "What the hell…those aren't demons," Yusuke said.

"No detective…those would be spirits," Hiei said matter-of-factly. "Which means my sword will be utterly useless…have fun detective," Hiei said and vanished.

"Damn demon always leaving me to handle the fights," Yusuke said powering up his shot gun just as the ninja's attacked. "SHOT GUN," he shouted and a bright light lit up the alley.

((Spirit World, Koenma's Office))

Koenma was lost under a huge pile of papers. Constantly papers were flying up and showering the room around him.

Botan walked in about that time and gasped, "Lord Koenma, sir, what are you doing," she exclaimed.

"No time Botan. I need you to help me find a file on someone," he said riffling through a manila folder and then tossing it aside.

Botan started to look through some papers, "And who exactly are we looking for sir, a wanted demon criminal, a mysterious apparition?"

"A human boy named Danny Fenton. He's to be living with Yusuke and I want to make sure he won't get suspicious of us or anything."

Botan stopped and looked up, "Why is he going to live with Yusuke of all people?"

"HOW SHOULD I KNOW?"

Just then George, the blue ogre assistant to Koenma, ran in, "I found it sir."

Koenma jumped up and snatched the file away from ogre. He opened it and found the usual file information. "Hmm…interesting."

Botan peered over Koenma's shoulder, "What is it sir?"

"Well according to the files Danny's parents are American ghost hunters. A year ago Danny was in an accident involving a portal into the ghost zone."

Botan looked curious, "You mean the spirit world?"

"Sort of…it's more like purgatory, not the actual spirit world."

"Shouldn't someone over in the American sector be informed sir?"

Koenma shook his head, "I've spoken with Dave already…he says there's been a lot of strange spirit energy readings in the Northern part of America, somewhere around Wisconsin."

"So what happened to this kid? You said he was in an accident."

Koenma sighed and tossed the file aside, "That's the strange part…there are no reports on what, if anything, happened to the kid. That's what worries me the most. If he was involved in an accident involving a portal to ghost zone…there's no telling. I mean we haven't had something like this happen before."

"Would you like me to keep an eye on him sir," Botan asked.

"Yes…in fact why don't you go with Yusuke tomorrow to meet him?"

Botan bowed, "Yes, sir."

((The Next Day, 11 am, Tokyo International Airport, Japan))

Yusuke yawned and stretched in the plastic seat he was sitting in at gate 16 of the airport, 'Stupid Koenma, Stupid Botan, Stupid Foreign Exchange kid,' he thought to himself. Yusuke had been out all night chasing the stupid ninjas then when he had finally returned home Botan was waiting for him and told him she was coming with him to pick up his exchange student. Then he ran into Keiko who agreed to join him, 'Could this day GET any worse?'

"What are you doing here Urameshi," an annoyingly familiar voice shouted.

Yusuke signed and looked up to find Kuwabara running towards them. "What are you doing here Kuwabara?"

"I'm here to pick up someone. I get to have a kid from America live with me," he said proudly.

Yusuke smirked, "You too huh?"

Kuwabara blinked, "They're actually letting someone live with you?"

"Shut up."

"Flight-242, San Francisco to Japan is now arriving."

People began to file off of the plane, talking and laughing happily. "Hey Yusuke…do you even know what the kid looks like," Keiko asked innocently.

Yusuke laughed uneasily, "Of course I do."

Keiko and Botan sweat dropped, "You have no idea do you."

"Well don't worry because I have a picture right here," Botan said reaching into her jeans pocket and pulling out a picture of a boy with messy dark hair and light blue eyes.

((The Plane, Tokyo International Airport))

Danny silently thanked God he was finally in Japan. What were the chances that he would have a seat RIGHT next to Dash the WHOLE flight? He felt like hell because Dash had messed with him the whole trip. Danny staggered up and pulled down his carry on bag. He hoped his host was a nice guy and would let him sleep. 'God forbid I get stuck with someone like Dash for a year,' he thought.

Tucker walked up to Danny, "You okay man? You look like you're about to pass out."

Danny shook his head, "You try sitting next to Dash for God knows how many hours and then we'll talk."

Tucker smirked, "So you ready to go meet our hosts?"

Danny nodded, "Anything to get away from Dash."

Danny and Tucker exited the plane. They reached the gate to find a lot of people milling around. "So who are you looking for Tuck," Danny asked.

"Some guy named Kazuma Kuwabara, you?"

"Yusuke Urameshi."

((Across the Gate, Tokyo International Airport))

Yusuke and Kuwabara sneezed.

"Wow there sure is a lot of people on that plane. Maybe we should have made a sign," Botan said

"If you think I'm going to be seen holding up some dorky sign Botan you have another think coming," Yusuke said.

"OI! DANNY FENTON AND TUCKER FOLEY WE'RE OVER HERE!" Kuwabara shouted.

Yusuke fell over, as he had been standing right next to him. He jumped up, "WHAT THE HELL ARE YOU DOING?!"

"Uhm…are you Kazuma Kuwabara," an African-American boy asked coming over to the group.

Kuwabara smiled, "I knew that would work. Yes I am Kuwabara Kazuma. You must be Foley Tucker."

Tucker blinked, "Actually my first name is Tucker."

Danny rolled his eyes, "Tucker…in Japan they go by last name first. It's a form of their honorifics system. Hi, I'm Danny," he said, "Kuwabara do you happen to know where someone named Urameshi Yusuke is."

Kuwabara jerked his thumb at the black haired, brown eyed guy standing beside him, "This is Urameshi Yusuke."

"Yo'"

"This is Keiko Yukimura."

Keiko bowed, "Nice to meet you."

"And this is Botan."

A blue smoke wisp escaped Danny's mouth and he gasped, 'There's a ghost nearby.'

Kuwabara's eyes widened, had he just seen blue smoke come out of Danny's mouth? Kuwabara narrowed his eyes, now that he focused on him; there was something strange about him.

"Well come on…they're probably unloading suit cases now," Yusuke said impatiently and heading off towards the main of the airport.

Danny and the others followed him, Danny trying to figure out why his ghost sense had gone off and Kuwabara trying to figure out why he was getting such weird vibes from Danny. Once Danny and Tucker had collected their luggage Yusuke and Kuwabara helped them carry it. They left the airport and were about to split ways when a strange sound came from a nearby alley.

"What was that," Keiko asked.

Yusuke set one of Danny's suitcases down and walked toward the alley. It was unnaturally dark and Yusuke glanced over his shoulder and noticed Kuwabara and Danny hovering nearby. Kuwabara shivered and made a motion to Yusuke to get the others to leave. 'There must be something down there if he wants me to ditch the others,' Yusuke thought. He then turned to Keiko, "Hey Keiko Kuwabara and I left something in the airport…do you mind taking Danny and Tucker to my house?"

Keiko blinked, "We could just wait out here for you Yusuke."

Yusuke cursed and pulled Keiko closer, whispering something in Japanese in her ear. He let her go and Keiko nodded, then turned to Tucker and Danny with a smile, "Well come on you guys. I'll show you around Japan."

"But what about Kuwabara and Yusuke," Tucker asked.

Keiko laughed nervously and started pushing the two boys away, "Come on…they have some business to take care of."

Danny started to walk away but another blue wisp escaped his mouth and he realized that it was probably coming from the alley, "Hey…uhm…Keiko…can you excuse me for a minute…I have to…uhm…go to the bathroom."

Keiko stopped pushing, "Sure. We can stop in this shop," she said.

Danny rushed in and headed straight for the back. Rushing into the men's room he locked himself in a stall and changed into ghost mode, 'Time to go see just what kind of ghosts haunt Japan.'

((Back at the Alley))

Kuwabara and Yusuke stepped into the alley, "Alright whoever's down here…you're about to face the wrath of the spirit detective…why not make it easy on yourself and come out," Yusuke said.

From the darkness of the alley emerged at least fifty ninjas. They weren't human though, Yusuke could sense that much right away from their sporadic movements and strange green glowing eyes. Yusuke sighed, they were much like the ninja's he fought last night, "Someone is really pissing me off with these damned ninjas," he muttered balling up his fist so he could use his shotgun.

Kuwabara summoned up his spirit sword in agreement, "Got that right. Man I don't think we've faced so many enemies in awhile," he muttered.

The ninja's faded into the walls of the alley, becoming like shadows and all at once swept towards Kuwabara and Yusuke. Yusuke fired off his Shotgun blast but it only seemed to leave holes in the cement and not affect the shadow ninja at all. "What the hell!"

Kuwabara brought his sword crashing down on the cement. The shadows exploded in the light from the sword and a few of the ninjas became solid again. Yusuke took this opportunity to use his spirit gun and knock a few out. The shadows retreated further into the alley and Kuwabara and Yusuke chased them down. However the shadows were actually leading them into a trap. When Yusuke and Kuwabara were at the very end of the alley the ninja's surrounded them and overtook them, plunging the two into complete darkness.

"Dammit I can't see a thing…what about you Kuwabara?"

"I see them moving but they're massed together I can't make out where they are…and my sword isn't helping light things up much."

"Mind if I help," a voice asked.

"Danny?"

Suddenly the ninja's scattered as a green blast erupted amongst them. Standing between Yusuke and Kuwabara was a white haired boy. He wore a black and white jump suit and his eyes glowed unnaturally green. Apart from the different colored hair and eyes he did look oddly like the American boy Danny they had left a few minutes before.

Kuwabara blinked, "You ARE that kid Danny."

The boy in the jumpsuit blinked, "How could you tell…I mean…what are you talking about?"

Yusuke stared at the boy, "Don't try and lie to us. Now how did you do that? I've never seen a spirit energy attack like that before…though it did kind of look like my spirit gun."

It was Danny's turn to blink, "Spirit what?"

((Above the alley))

A tall female figure watched them from the top of a building. She wore a long black trench coat and a short Chinese style dress in dark purple. Her black hair fell around her in waves down her back and her eyes were an unnatural silver color. She smirked at the three boys below her, everything was going as planned. With the spirit detective and halfa in the same city it would be much easier to accomplish her goal.

"Let's up they're up to the task…I wouldn't want them to fail any of the tests I have planned for them," she said. She smirked again and disappeared in a flash of black light.

Ending Notes: Now if you wouldn't mind…please review our story! Crimson Ninja and I look forward to hearing from you! REVIEW!