How do you get masamune date in warriors orochi

Shu Chapter 5-X: Battle of Jie Ting -- Masamune Date (SH5)

OBJECTIVE: Complete the optional missions given

TIPS: 1) Run down the west flank and defeat Zhang Wei and Kojuro Katakura.

2) Now run to the middle and defeat Zhang Xiu

3) They may of reached the middle by now but if they haven't, go and defeat
Tsunamoto Oniniwa and Cao Xing who were down the east flank

4)By this time Dong Xi and Sun Shang Xiang should of reached the middle of the
stage near Magoichi, defeat them and then wait for the message from Masamune
where he says something similar to "Using himself as bate to attack on the
flanks..." this means your ploy was successful and you can now go, defeat
Masamune and unlock him :)

NOTE: Don't rush up the mountain too soon or Magoichi will say something
similar to "Don't make it too obvious" and if you keep going he will say
something like "Ahh no theres nothing for it everyone charge" in which case you
failed your mission. So patience is a virtue unless your can't kill all the
generals ASAP then you don't have to worry about being to fast just watch out
for the "Using himself as bate to attack on the flanks..." message from
Masamune.

hope this helped u.