code: def _retrieve_kuzushiji_mnist_test():
      base_url = "http://codh.rois.ac.jp/"
      urls = [
          base_url + "kmnist/dataset/kmnist/t10k-images-idx3-ubyte.gz",
          base_url + "kmnist/dataset/kmnist/t10k-labels-idx1-ubyte.gz",
      ]
      return _retrieve_kuzushiji_mnist("test.npz", urls)
  
file_path: chainer/chainer/datasets/kuzushiji_mnist.py
imports: import os
  import numpy
  import chainer
  from chainer.dataset import download
  from chainer.datasets._mnist_helper import make_npz
  from chainer.datasets._mnist_helper import preprocess_mnist
label_desc: Use image node_id 4 for calling a global function with example usage: _retrieve_kuzushiji_mnist_test() and returns: _retrieve_kuzushiji_mnist