http://www.o-cha.com/green-teas/shincha/ This is the shincha page.
OK...some "guidelines" to brewing. Please feel free to ask here if you have a specific question.
MIYABI is from Uji. It is likely to be classified as Chumushi Cha or mid steamed. To brew. Sal, Alex, and Wes have a bonus bag of Miyabi. Your bonus bag has enough for one session, 4 grams. All other bags of Miyabi have 8 grams, enough IMO for 2 sessions.
I recommend 4 grams (exactly 1/2 of your 8 gram bag) per 200 ml...7ish ounces ounces. If you like your sencha stronger, use less water instead of more leaf or you will cut into your second session's leaf.
I brew this lighter and have been pleased with the results. I brew it in a preheated pot with a fine screen at 165-168* for 1.5 minute. I am all for slow pouring of this shincha, so I start pouring 15ish seconds before time is up.
2nd...a very good steep. 175* for 30 seconds...starting the slow pour at 15 sec
3rd...this steep was really good too. 180* for 40ish sec
4th...if you are obsessive like Wes, 190ish* for 2-3 min
5th...if you are just crazy like me, pour water right at boiling and steep for AT LEAST 10 min. I often four and remember it an hour or more later and no harm done. All the other layers of flavor are gone by now except gentle sweetness. PLEASE NOTE, 5th step of sencha are not for everyone, most people stop at 3 steeps.
FUKAMUSHI SUPREME This is from Shizuoka prefecture. I generally brew shincha from here at a lower temp, but I find this to be fairly forgiving. Your bags fuka bags have 9 grams...enough for 2 sessions for all but maybe the Frenchman

I recommend 4.5 grams per 6 ounces, again, if you like it stronger, go for it with this one. In a preheated pot with a fine screen use 160-165* water for 75 seconds. I STRESS SLOW POURING THROUGH THE FIRST 3 STEEPS FOR THIS OR IT CAN ADD TOO MANY ULTRA FINE PARTICLES TO YOUR POUR. A slow pour will deliver a sweeter more consistant cup!. So, I start pouring at 60 seconds.
2nd...you will like the second if done right! Think "soylent green." 172-175* for 20-30 seconds, start pouring SLOWLY at 15 seconds.
3rd...again really green. 180* for 40-50 sec. I start slow pour at 40.
4th...190ish* for 2ish minutes.
5th...boiling water for at least 10 minutes.
The Fukamushi...the green color is not the actual color of the liquor, it is suspended particles that will settle as you drink. I will either swirl my cup a little to keep them suspended...or allow them to seetle and then add them to the next pour...adding more flavor to the next steep.
A note on SLOW POURING. Slow pouring of sencha has a dual purpose for me. First, it prevents excessive clogging of your screen. If you try to dump finer leaf sencha it will clog up your screen and slow your pour to a trickle...making a bitter brew and frustrating you.
2ndly, Pouring slowly allows the water to slowly flow over the settled leaf, preventing bitter brew and too much particle in your liquor.
Trust me, you will have particle in your liquor, this adds to the color and flavor of the liquor, too much of this give you bitter brew and a clogged screen.
OK...probably TMI, but I hope everyone enjoys the shincha experience!