pip install python-docx lxml

from docx.shared import Mm

section = document.sections[0]
section.page_width = Mm(210)
section.page_height = Mm(297)
section.top_margin = Mm(25.4)
section.bottom_margin = Mm(25.4)
section.left_margin = Mm(31.75)
section.right_margin = Mm(31.75)

from docx import Document
from docx.shared import Pt
from docx.oxml.ns import qn

document = Document()

# デフォルトフォントの設定
style = document.styles['Normal']
font = style.font
font.name = 'Yu Mincho'  # 英数字用
font.size = Pt(10.5)     # 日本語文書の標準サイズ

# 日本語フォントの設定（rFonts の eastAsia 属性）
rPr = style.element.rPr
if rPr is None:
    rPr = style.element.makeelement(qn('w:rPr'), {})
    style.element.append(rPr)
rFonts = rPr.makeelement(qn('w:rFonts'), {})
rFonts.set(qn('w:eastAsia'), '游明朝')
rPr.append(rFonts)

from docx.oxml.ns import qn
from lxml import etree

section = document.sections[0]
sectPr = section._sectPr

# テキスト方向を縦書きに設定
textDirection = sectPr.makeelement(qn('w:textDirection'), {})
textDirection.set(qn('w:val'), 'tbRl')  # Top-to-Bottom, Right-to-Left
sectPr.append(textDirection)

from docx.oxml.ns import qn
from lxml import etree

def add_ruby(paragraph, base_text, ruby_text, font_name='游明朝', base_size=21, ruby_size=10):
    """ルビ付きテキストを段落に追加する"""
    ruby_elem = paragraph._element.makeelement(qn('w:r'), {})

    ruby_xml = f'''
    <w:ruby xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main">
        <w:rubyPr>
            <w:rubyAlign w:val="distributeSpace"/>
            <w:hps w:val="{ruby_size}"/>
            <w:hpsRaise w:val="{base_size + 2}"/>
            <w:hpsBaseText w:val="{base_size}"/>
            <w:lid w:val="ja-JP"/>
        </w:rubyPr>
        <w:rt>
            <w:r>
                <w:rPr>
                    <w:rFonts w:eastAsia="{font_name}"/>
                    <w:sz w:val="{ruby_size}"/>
                </w:rPr>
                <w:t>{ruby_text}</w:t>
            </w:r>
        </w:rt>
        <w:rubyBase>
            <w:r>
                <w:rPr>
                    <w:rFonts w:eastAsia="{font_name}"/>
                    <w:sz w:val="{base_size}"/>
                </w:rPr>
                <w:t>{base_text}</w:t>
            </w:r>
        </w:rubyBase>
    </w:ruby>
    '''
    ruby_element = etree.fromstring(ruby_xml)
    ruby_elem.append(ruby_element)
    paragraph._element.append(ruby_elem)

# 段落に禁則処理を設定
pPr = paragraph._element.get_or_add_pPr()
kinsoku = pPr.makeelement(qn('w:kinsoku'), {})
kinsoku.set(qn('w:val'), '1')  # 禁則処理を有効化
pPr.append(kinsoku)

# ワードラップ設定
wordWrap = pPr.makeelement(qn('w:wordWrap'), {})
wordWrap.set(qn('w:val'), '0')  # 日本語の文字単位で折り返す
pPr.append(wordWrap)

from docx.shared import Cm, Pt
from docx.enum.text import WD_ALIGN_PARAGRAPH
from docx.enum.table import WD_TABLE_ALIGNMENT

def add_inkan_table(document, labels=None):
    """印鑑欄を追加する（右寄せの3マス表）"""
    if labels is None:
        labels = ['承認', '確認', '担当']

    table = document.add_table(rows=2, cols=len(labels))
    table.alignment = WD_TABLE_ALIGNMENT.RIGHT

    for i, label in enumerate(labels):
        # ラベル行
        cell = table.cell(0, i)
        cell.text = label
        cell.paragraphs[0].alignment = WD_ALIGN_PARAGRAPH.CENTER
        cell.width = Cm(2.5)

        # 印鑑スペース行（空白、高さで印鑑サイズを表現）
        cell = table.cell(1, i)
        cell.text = ''
        cell.height = Cm(2.5)

    return table

from docx.shared import Pt, Cm, RGBColor
from docx.enum.table import WD_TABLE_ALIGNMENT

def style_business_table(table):
    """ビジネス文書用テーブルスタイルを適用"""
    table.alignment = WD_TABLE_ALIGNMENT.CENTER

    for row in table.rows:
        for cell in row.cells:
            for paragraph in cell.paragraphs:
                paragraph.style.font.size = Pt(10)
                paragraph.style.font.name = 'Yu Mincho'

    # ヘッダー行の背景色を設定
    for cell in table.rows[0].cells:
        shading = cell._element.makeelement(qn('w:shd'), {
            qn('w:fill'): 'D9E2F3',
            qn('w:val'): 'clear'
        })
        cell._element.get_or_add_tcPr().append(shading)