Use self.grad_var instead of _grad_var
Use self.grad_var instead of _grad_var

okuta/chainer,okuta/chainer,wkentaro/chainer,jnishi/chainer,jnishi/chainer,jnishi/chainer,hvy/chainer,wkentaro/chainer,hvy/chainer,niboshi/chainer,jnishi/chainer,chainer/chainer,wkentaro/chainer,ktnyt/chainer,niboshi/chainer,okuta/chainer,niboshi/chainer,hvy/chainer,chainer/chainer,keisuke-umezawa/chainer,keisuke-umezawa/chainer,tkerola/chainer,pfnet/chainer,niboshi/chainer,chainer/chainer,chainer/chainer,keisuke-umezawa/chainer,keisuke-umezawa/chainer,ktnyt/chainer,wkentaro/chainer,ktnyt/chainer,okuta/chainer,ktnyt/chainer,hvy/chainer