日本語Unicode文字列をサンプリング https://stackoverflow.com/questions/1477294/generate-random-utf-8-string-in-python https://stackoverflow.com/questions/19899554/unicode-range-for-japanese

japanese_character_sampler.py

import random

def get_random_unicode(length):
    """ 以下表を参考に恣意的な文字範囲選択を行っている
    http://www.rikai.com/library/kanjitables/kanji_codes.unicode.shtml
    """

    try:
        get_char = unichr
    except NameError:
        get_char = chr

    # Update this to include code point ranges to be sampled
    include_ranges = [
        ( 0x3000, 0x3010 ),  # Japanese-style punctuation
        ( 0x3041, 0x3093 ),  # Hiragana
        ( 0x30a1, 0x30fc ),  # Katakana
        ( 0xff10, 0xff65 ),  # Full-width roman characters and half-width katakana
#         ( 0x4e00, 0x9faf ),  # CJK unifed ideographs - Common and uncommon kanji 
#         ( 0x3400, 0x4dbf ),  # CJK unified ideographs Extension A - Rare kanji ( 3400 - 4dbf)
    ]

    alphabet = [
        get_char(code_point) for current_range in include_ranges
            for code_point in range(current_range[0], current_range[1] + 1)
    ]
    return ''.join(random.choice(alphabet) for i in range(length))