erro while trying to export sbdf to path that contains Japanese characters

[lwlwlwlw]

If I try to export sbdf to path that contains Japanese characters, the sb.export_data() function fails with error as below.

import pandas as pd
import numpy as np
import spotfire.sbdf as sb

df = pd.DataFrame(np.random.randint(0, 100, size=(5, 10)))
# print(df)
# sbdf_file = 'D:/tmp/test.sbdf' 
sbdf_file = 'D:/tmp/データ.sbdf'
# sbdf_file = 'D:/tmp/テスト/test.sbdf'

sb.export_data(df, sbdf_file)

OSError Traceback (most recent call last)
Cell In[36], line 11
8 sbdf_file = 'D:/tmp/データ.sbdf'
9 # sbdf_file = 'D:/tmp/テスト/test.sbdf'
---> 11 sb.export_data(df, sbdf_file)

File d:\env\python\Lib\site-packages\spotfire\sbdf.pyx:1808, in spotfire.sbdf.export_data()

OSError: [Errno 42] Illegal byte sequence

[lwlwlwlw]

PS, I am using Windows 10 Japanese.
In control panel, the "Region" dialog -> "Administrative" tab -> "Language for non-Unicode programs" is configured as "Japanese (Japan)"

[lwlwlwlw]

If I tried to export sbdf to folder that contains different Japanese characters than above,
the error could change. I have confirmed that the folder does exist already.

sbdf_file = 'D:/tmp/新しいフォルダー/test.sbdf'

FileNotFoundError Traceback (most recent call last)
Cell In[43], line 12
9 sbdf_file = 'D:/tmp/新しいフォルダー/test.sbdf'
10 # sbdf_file = 'D:/tmp/テスト/test.sbdf'
---> 12 sb.export_data(df, sbdf_file)

File d:\env\python\Lib\site-packages\spotfire\sbdf.pyx:1808, in spotfire.sbdf.export_data()

FileNotFoundError: [Errno 2] No such file or directory