Nothing is as simple is as it seems. Why didn’t the police know?
According to newspaper reports of the time, during the trial Okin spoke through an interpreter, and was rigorously cross-examined by the defence. But there are no records left of what she had to say. However in the State Records Office of Western Australia, we can still find the original copy of her pre trial witness disposition along with those of Enaba and Constable John Donovan. There are also statements by the accused, Charles Francis, William Gleeson and Charles Edwards, prepared by their defence lawyer, along with a witness statement for the defence by John Harford, a regular client of Okin’s.
From an overall point of view, visiting the State Records office didn’t yield much beyond what I had already known of this case. However some previously unknown details sang out: Constable John Donovan, the arresting officer, who testified that he didn’t know that Okin’s house was a brothel, said in his statement that he had “… not had the occasion to watch this house as a brothel. I have not been long at Malcolm.” Another point of interest was that he had rushed to the house with another police officer, Buttle.
From what I had previously read about the times, it seems highly unlikely that both police officers not know that Okin’s house was a brothel and that she was a prostitute.
I cannot help but to think that things are not as simple is as it seems.
I met Okin for the first time buried inside a folder entitled ‘Violent Crimes’
I met Okin for the first time nestled amongst the original manuscripts of D.C.S. Sissons at the Special Collections reading room in the National Library of Australia (NLA). Okin was buried inside a folder entitled ‘Violent Crimes,’ inside a box full of folders dedicated to karayuki san.
Karayuki,literally means going to China, and is the term commonly used for Japanese women, mostly from Kyushu, who worked overseas for subsistence. According to an article in the Tokyo daily newspaperKokumin in early 1896, often the women were smuggled outside onboard steamers; usually went to Hong Kong first, where they were found by agents, and sold to brothels including those in Australia. At the time there were about 200 Japanese brothels, perhaps more according to further research by Sissons, operating in Australia. Most Japanese women living in Australia around this time were prostitutes, although various census results showed that they had listed their occupations as seamstresses, laundress, servants and alike. 
Around 3pm on the 29th of July, 1898, three men allegedly forced themselves into a house occupied by a Japanese man and several Japanese women in Mount Malcolm (Western Australia). The two of the younger men, William Gleeson and Charles Francis raped Okin in her bedroom whilst the older man, Charles Thomas Edwards, stood guard at the door. The Japanese manager Enaba went to the police for help. When Constable John Donovan arrived on the scene, Edwards was no longer there, but he heard a woman screaming, and he found Okin lying on the bed with Gleeson at the foot of the bed, and Francis standing at her head. Clothing of all three were in disarray. Donovan arrested the two men. The third man Edwards was arrested at a later date. 
Francis stated that two days prior to the alleged offence, he had visited Okin and was entertained by her. On the day in question, he visited again in company of his friends. His friends waited in the next room whilst he was with Okin. He called his friend Gleeson for a loan of a pound to offer to her. Gleeson entered the room to lend him the money, whilst Okin replied she had no change. Gleeson was “making overtures ” to her, when the police arrived and arrested them.
Okin’s rape case went to the Criminal Court in Western Australia on 7 October, 1898 before his Honour Justice James and a jury of 12. Francis and Gleeson were charged with “carnally knowing against her will,” and Edwards, for having aided and abetted Francis. The men pleaded not guilty. All women and youths under 18 years of age were ordered out of court.
The Crown Solicitor, R. B. Burnside detailed the case, and stressed the importance of protecting the chastity of women whatever her “colour and creed.” He added that even if she was “only a courtesan, and however low her character, if she did not consent she was entitled to the protection which the law gave to her in common with the most virtuous of women.”
Okin and Enaba gave statements through an interpreter. They both denied that the place they and several other women lived was a brothel, and that Okin had been working there as a laundress. Her hour long cross examination by the defence lawyer Vyner was mostly to elicit facts regarding her mode of living, which at times were delicate, and solicited laughter from the court as well as from the accused.
Justice James summed up the case, referring to the difficulty of obtaining evidence from Japanese witnesses through an interpreter; that there was no evidence that Okin was a prostitute, and on the contrary, the evidence given by Constable Donovan showed that the house where she lived was not known, as usually was, as a brothel; that he agreed with the Crown Solicitor that rape was rape regardless of the reputation of the woman; and that the charge was most serious: rape was a capital offence.
The jury could not agree in the first instance and the court adjourned. [AN ALLEGED CAPITAL OFFENCE. THREE MEN CHARGED. THE JURY UNABLE TO AGREE., 1898]
The jury eventually returned a not guilty verdict and then men were acquitted on 18 October, 1898.
 Sissons, D. C. S. & Horwitz, Solis. 1950, Papers of D.C.S. Sissons, 1950-2006 [manuscript]
 Sissons, D.C.S. (1977) ‘Karayuki‐San: Japanese prostitutes in Australia, 1887–1916— I*’, Historical Studies, 17(68), pp. 323–341. doi: 10.1080/10314617708595555.
AN ALLEGED CAPITAL OFFENCE. THREE MEN CHARGED. THE JURY UNABLE TO AGREE. (1898) The West Australian, 8 October, p. 7.
THE MOUNT MALCOLM CASE. ACCUSED ACQUITTED (1898) The West Australian, 19 October, p. 7.