IMPORTANT!!!:
NEVER WALK YOUR YORKIE ON A COLLAR!!! ALWAYS WALK HIM/HER ON A HARNESS!!! Since yorkie necks are so fragile, if they are being walked on the collar, they can see a squirrel/whatever, and they go after it, and your dog may "kick the canine bucket."
Thats how my aunt lost Mick Jagger Jr. (RIP Mick Jagger Jr.)
The harness is the best way to go, however, you can have a collar with the tags on at the same time, just
attach the leash to the harness.
Okay, besides that...
1) Have Haruka walk around the house with the leash on for about a week or two, to get the feel of it on her. (You don't have to hold the leash, just let her run around with it.)
2) Begin walking Haruka, and when you feel her begin to pull one way, just walk the direct opposite way. This gives her a feel of who is boss.
If she runs, then stop where you are, and she should run the leash taught. Wait for her to come to you, and walk the opposite way.
If she is being stubborn, and just keeps trying to pull you, stay there until she gets the message, and walks your way.
3) When you have her leash trained, and if she is walking ahead of you:
Stop.
call her name and say "no."
she should come to your side and start walking agian.
Keep doing this until she gets the hang of walking beside you.
*
ALWAYS PRAISE HER WHEN SHE IS WALKING NEXT TO YOU!!! 
I hope this is useful, thats how i got my Tugger walking right
